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Old 06-03-2009, 08:50 AM   #1
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Day One. Post One. I love all of you guys you know that (I say that in the most hetero way possible)?

Here is the G1 FAQ with clickable links to threads that will answer questions for some of the most common questions, issues, and problems that arise with our G1's.

First things first...the SEARCH Function.
There are many things that have been discussed here many times before...check it out and do lots of research...if you cant find your answer in a SEARCH or in this FAQ...start a new thread...and heres a little TIP:



You can narrow down your search to only the G1 Section by selecting it in the "Search in Forum" box!

Other GREAT Resources:
legend-reference.tk
Auto Trans Info



G1 Workshop Manual

Special thanks again to Pacallen and wksebati for hosting the manual for us!! They make this valuable tool available to all of us!

Download this version that allows easier navigation of the manual:
G1 Legend Coupe Manual PDF UPDATED

Helms Manual Hosted on the Legend Wiki

Mirror Sites (be sure to "Right Click, Save As"):
PDF Version 1
PDF Version 2
PDF Version 3

The PDF Version takes a few minutes to completely load, but once it does, SAVE IT TO YOUR HARD DRIVE by clicking the "SAVE A COPY" button in your viewer. You can now run it directly from your computer by simply opening it in a PDF Reader Program.


G1 General

Regular Service Maintenance Schedule
ECU Codes and What they Mean
TCU Codes and what they Mean
Lifter Ticking 101-Explanation and Solutions
Auto Transmission shifting problem?
Want better Fuel Economy? Here's the thread!
Main Relay Symptoms
Main Relay Repair
Bypass Control Solenoid Replacement
A/C Compressor Replacement Info
A/C Compressor Rebuild
Console and Stereo Removal Procedure
Auto Climate Control Self Diagnosis


G1 Performance

Mod Secrets and G1 Performance Tips
Swapping from an AUTO to Manual Tranny--General Info
DIY Cold Air Intake
OBX Headers Vs. Stock Headers Comparo
Short Shifter
Fut's G1 Specific Custom Sway Bars
B&M Fuel Pressure Gauge
B&M Fuel Pressure Regulator
MSD -6A Ignition Install DIY
SDS Engine Management Install on C27a1 DIY
Larger OEM Honda Sway Bar Install DIY
WANT TO BUY A TURBO SETUP?? CLICK HERE...


G1 Interior and Exterior Mods

86-88 Sedan Clear Turn Signals DIY
Swap 89-90 Sedan 1-Piece Headlights onto 86-88 Sedan
Iggee Seat Covers
Taurus Cupholders Mod
Prelude Steering wheel in a G1
Reverse Glow Gauges
G1 Speaker Size Chart
Trunk Light Mod
G1 Dimmer Mod
Trunk light not working? Possible Fix
Interior Cathode Lights
Fan Control Repair
Relocating the Battery to the Trunk
Misc Interior Mods

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Old 06-03-2009, 08:50 AM   #2
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G1 DIYs

Engine and Transmission
Changing the PCV Valve
Cold Air Intake Replacing Stock Plumbing
Cold Air Intake with Stock Air Box
Speedometer Cable Lubrication
Water Pump Replacement (no pics)
Alternator Brush Replacement
Alternator Removal/Replacement
Speedometer Cable Housing Replacement
Ground Wires Upgrade Install
A/C R12 to R134a Retrofit
Side Valve Cover Gasket Replacement/Broken Bolt Repair
Oil Cooler Figure-8 O-Ring Replacement
Fan Control Unit Repair
Auto Tranny solenoids cleaning
Auto Tranny Kickdown cable Adjustment
MSD -6A Ignition Install DIY
SDS Engine Management Install on C27a1 DIY
Main Relay Repair DIY
Fuel Injector Seal (O-Ring) Replacement
Bypass Control Solenoid Replacement


Suspension and Braking
Front Disc Brake pad and Rotor Replacement
Rear Disc Brake pad and Rotor Replacement
Painting Calipers Without Removal
Stainless Steel Brake Lines and Painted Calipers Install
Power Steering Flush
Steering Slack Fix
Steering Rack Removal
Steering Rack Install
Larger OEM Honda Sway Bar Install DIY


Interior
Heater / AC fan motor repair
Prelude Steering wheel in a G1 Install
Reverse Glow Gauges Install
Video DIY-G1 Dimmer Mod
Write Up and Video DIY Ford Taurus Cupholder Install
Manual Shifter Boot
Replacement

Interior Cathode Lights Install
Trunk Light Cathode Install
Info Center Install on non-LS Car
Trunk light not working? Possible Fix-DIY
Sunroof/Moonroof Assembly Replacement
Relocating the Battery to the Trunk


Exterior
Hooking up Center Lowbeams on Coupes
Swap 89-90 Sedan 1-Piece Headlights onto 86-88 Sedan
9004 to 9007 Bulb conversion
86-88 Sedan Clear Turn Signals
Leaky Sunroof? Sunroof Drains Clearing DIY
How to Remove Mirror Glass
86-88 Sedan Foglights stay on with High Beams Mod
86-88 Sedan Fogs as DRLs

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Old 06-03-2009, 08:51 AM   #3
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Taken from the Acura Legend Wiki:

Honda introduced the model in 1985 in Japan to be their premier luxury model and in 1986 North America as the range-topping model in its then-new Acura lineup. The first generation Legend is notable for many technical innovations. The coupe was the first to be engineered using CAD (computer aided design). Sedan models came to market first, powered by a 151 hp (113 kW) 2.5 L C25A V6 with coupes appearing for 1987 powered by a new 161 hp (120 kW) 2.7 L C27A engine. Sedans received the new engine for 1988. Production of the first generation models ended in 1990 as a second generation version became available.





The Legend was indeed an impressive car receiving accolades from all sides, winning Car and Driver's Ten Best three years in a row and Motor Trend's "Import Car of the Year" for 1987. Legends were regarded for their impeccable fit and finish, incredible reliability, and good performance. Manual-equipped models could sprint to 60 mph (97 km/h) in under 8 seconds and reach a top speed of 135 mph (217 km/h). Sedan models had a coefficient of drag of .32, while coupes were only .30.




Technical highlights were numerous, featuring a 24-valve V6 engine, variable length intake manifold, double-wishbone suspension, 4-wheel disc brakes, air bag and an information system that could monitor maintenance intervals, fluid levels, and fuel economy.

In 1989, the sedan received some minor tweaks with new one-piece front headlamps, a new front bumper, a revised trunk lid, new tail lights, and new alloy wheels. Inside, a revised dash and seat cloth patterns is also noticeable. The high end LS now featured a trip computer in the center stack.

In 1990, the Legend LS coupe was revamped with a woodgrain interior, clear/red taillights, and a new body-colored grille. The sedans also received the woodgrain interior for the LS model.


Sedan OEM Wheels 1986-1988


Sedan OEM Wheels 1989-1990


Coupe OEM Wheels 1987-1990



Trim Differences (Base vs L vs LS)





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Old 06-03-2009, 08:52 AM   #4
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Vacuum Diagram




Radio Wiring Diagram



Speaker Size Chart
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Old 06-03-2009, 08:53 AM   #5
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Underhood Fuse box diagram


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Old 06-03-2009, 08:55 AM   #6
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Paint Codes List

Exterior codes; on driver's door jamb.
Interior type code; on passenger's door jamb.


Quote:
Originally Posted by telafonic
*updated*

This info speaks for US market cars only.

1986 Available colors:

NH-509 = Olympia White (two-tone only I believe)

NH-95M = Blade Silver Metallic

B-37M = Florence Blue Metallic Z

YR-74M = Ascot Gray Metallic (two-tone only I believe)


1987 Sedan:

B-37M/NH-92M = Florence Blue Metallic/Gothic Gray Metallic

B-41/YR-74M = Antiqua Blue/Ascot Gray Metallic

NH-509/YR-79M = Olympia White/Savanna Gray Metallic

NH-514M/YR-76M = Ebony Black Metallic/Bristol Gray Metallic

NH-516M/NH-92M = Noble Silver Metallic/Gothic Gray Metallic

YR-74M/YR-78M = Ascot Gray Metallic/Volcanic Gray Metallic

Although those above codes are shown as two-tone, I believe most of the first colors shown were available by themselves (non-two-tone). I say most because I know I have never seen/heard of an '87 stock Olympia White sedan without the gray on the bottom.


1987 Coupe;

NH-509/NH-502M Olympia White/Asturias Grey Metallic

NH-514M/NH-502M Ebony Black Metallic/Asturias Grey Metallic

NH-516M/NH-502M Noble Silver Metallic/Asturias Grey Metallic

B-41/NH-502M Antigua Blue/Asturias Grey Metallic

YR-82M/YR-78M Bahama Gold Metallic/Volcanic Grey Metallic



1988 Sedan;

B-37M - Florence Blue Metallic

YR-82M - Bahama Gold Metallic

R-65P - Persian Red Metallic (L and LS only)

R-61M - Chateau Red Metallic (Base and base with sunroof only)

NH-503P - Granada Black Pearl (LS only)

NH-514M - Ebony Black Metallic (L only)

NH-509A/YR-85M - Olympia White/Marshall Silver Metallic

YR-74M/YR-78M - Ascot Gray Metallic/Volcanic Gray Metallic


1989 Coupe:

YR-82M/YR-78M - Bahama Gold Metallic/Volcanic Gray Metallic

G-62P/NH-502M - Geneva Green Metallic/Asturias Gray Metallic

NH-503P/NH-502M - Granada Black Pearl/Asturias Gray Metallic

NH-514M/NH-502M - Ebony Black Metallic/Asturias Gray Metallic

B-37M/NH-502M - Florence Blue Metallic/Asturias Gray Metallic

B-49M/NH-84M - Laurel Blue Metallic/Mirage Silver Metallic

R-65P/NH-502M - Persian Red Pearl/Asturias Gray Metallic

R-51/NH-502M - Phoenix Red Metallic/Asturias Gray Metallic

NH-516M/NH-502M - Noble Silver Metallic/Asturias Gray Metallic

NH-509A/NH-502M - Olympia White/Asturias Gray Metallic


1990 Coupe:

YR-82MA/YR-78M - Bahama Gold Metallic/Volcanic Gray Metallic

G-62P/NH-502M - Geneva Green Pearl/Asturias Gray Metallic

YR-92M/YR-74M - Tuscany Taupe Metallic/Ascot Gray Metallic

NH-531MA/NH-502M - Asturias Gray Metallic

B-50M/NH-92M - Melbourne Blue Metallic/Gothic Gray Metallic

B-54P/NH-92M - Cobalt Blue Pearl/Gothic Gray Metallic

R51/NH-502M - Phoenix Red/Asturias Gray Metallic

NH-515P/NH-502M - Sirius White Pearl/Asturias Gray Metallic

NH-509A/NH-502M - Olympia White/Asturias Gray Metallic



Original post;

Okay, I've noticed by looking around the web and even talking with Acura Parts that a comprehensive list of our G1 paint codes and their correlating colors would be nice. Interior codes would be good too.
Exterior codes; on driver's door jamb.
Interior type code; on passenger's door jamb.

I'm going to post the ones I know exist, feel free to add yours or correct mine if you want. Oh, and please don't guess. If you're not sure what your color is called, don't post it since it might confuse others.
It would also be nice to have pictures next to the colors if possible, so if you want to, post one good pic of your car showing the color well, or you can email it to me at telafonic at gmail.com and I'll put it up.

I believe the colors below were only on G1's and weren't carried on to G2's, and there are obviously some missing like red, so help me out.

Exterior Paint Codes;

NH-509 = Olympia White

NH-531M = Charcoal Granite Metallic

NH-92M = Gothic Gray Metallic

NH-95M = Blade Silver Metallic

B-29M = Midnight Blue Metallic

B-37M = Florence Blue Metallic

B-50M = Melbourne Blue Metallic

YR-74M = Ascot Gray Metallic

YR-78M = Volcanic Gray Metallic

YR-79M = Savannah Gray Metallic

YR-82M = Bahama Gold Metallic


P.S. The M in the code stands for Metallic.

Interior Type Codes;

Type A = Black Leather

Tybe B = Ivory Leather

Type C = Off Black Leather

Type E = Grey Leather

Type H = Burgundy Moquette

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Old 06-03-2009, 07:05 PM   #7
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I'll add mine from 1990 once again (soon to be repainted):

YR-92M = Tuscany Taupe Metallic (aka mud brown)
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Old 06-03-2009, 08:02 PM   #8
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Below added from a wiki-style page I created. I'll see if I can't be quick enough on the edit to add clickable pic links to further illustrate certain items. If you see any errors, please feel free to correct them!

Honda/Acura Legend (First Generation)

Production Versions
KA1: Japan-spec sedan (RHD), 1986-1988
KA2: Japan-spec sedan (RHD), 1986-1987
KA2: European/Australian-spec sedan (RHD/LHD UK), 1986-1987
KA2: American-spec sedan (LHD), 1986-1987
KA3: Japan-spec coupe (RHD), 1987-1990
KA3: European/Australian-spec coupe (RHD/LHD UK), 1987-1990
KA3: American-spec coupe (LHD), 1987-1990
KA4: Japan-spec sedan (RHD), 1988
KA4: European/Australian-spec sedan (RHD/LHD UK), 1988
KA4: American-spec sedan (LHD), 1988-1990
KA5: Japan-spec sedan (RHD), 1989-1990
KA6: Japan-spec sedan (RHD), 1989-1990

Production/Design Notes
Although the Honda Legend used the same one-piece headlight design (with integrated foglights)for all models 1985-1990, the USDM KA2 sedan featured a split headlight/foglight design (and different grille) for 1986-1987, switching over to the one-piece headlights in 1988. In addition, while the USDM sedan interior was redesigned for 1989, all other market Legends kept the original interior, which can be clearly seen in the door panels and dashboard. The coupe design seems to remain the same for all markets and model years.

History
What makes the Legend unique?
The Legend was one of two models that launched under the Acura brand in the US (the other being the Integra). It was the first Honda passenger vehicle to use a V6 engine, itself an all-aluminum 24-valve with a variable-length intake manifold developed from Honda’s F1 experience. The coupe was the first automobile to be engineered using CAD (computer aided design).

When was the Legend introduced?
The Honda Legend was introduced in November 1985 (in Japan) as a 1986 model. Production at the plant in Saitama, Japan ended September 1990 as the new (second generation) model was introduced.

Where was the Legend sold or imported?
The Legend was sold as a Honda Legend in Japan, Mexico, Europe, Australia, and parts of China, and as an Acura Legend in the USA and Canada. Additionally, it was imported into Russia, New Zealand, and several other countries.

Production Data
Honda Legend:
1986-1987 V6 Xi 2500 (KA2) - C25A - Power driver’s seat, adjustable rear seats, power folding mirrors, remote locking/keyless entry, power tilt/slide sunroof
1986-1990 V6 Zi (KA1*) - C20A
1986-1988 V6 Gi (KA1) - C20A
1987-1990 2Dr Exclusive (KA3) - C27A - Auto only, leather seats, wood trim, power front seats, power tilt/slide sunroof
1988-1990 V6 Xi Exclusive (KA4**) - C27A - Auto only, wood trim, leather seats, remote locking/keyless entry, power tilt/slide sunroof
1988-1990 V6 Xi 2700 (KA4**) - C27A - Auto only
1988-1990 V6 Gi Exclusive (KA1*) - C20A - Auto only, wood trim, leather seats
1988-1990 V6 Mi (KA1*) - C20A
1989-1990 V6 Ti Exclusive (KA5) - C20AT - Auto only, power folding body-colored mirrors, foot-operated parking brake, leather seats, extensive wood trim, keyless entry, power seats, power tilt/slide sunroof
1989-1990 V6 Ti (KA5) - C20AT

*In 1989 the KA1 platform was redesigned and renamed KA5
**In 1989 the KA4 platform was redesigned and renamed KA6

Honda Japan MSRPs (in USD):
1986 V6 Xi 2500 - $26,800
1989 V6 Mi - $17,900
1989 V6 Ti - $21,700
1989 V6 Gi Exclusive - $21,900
1989 V6 Xi Exclusive - $25,100
1989 V6 Ti Exclusive - $25,100

Acura Legend:
1986-1988 Sedan (KA2) - C25A
1987 Sedan L (KA2) - C25A - Leather seats, leather steering wheel, 4-way power driver’s seat, dual illuminated vanity mirrors, heated side mirrors
1987 Coupe/Coupe L (KA3) - C27A
1988 Sedan (KA4) C27A - Power sliding sunroof
1988 Sedan L (KA4) - C27A - Security system, anti-lock brakes
1988 Sedan LS (KA4) - C27A - Driver’s side airbag, Bose audio system, 10-way memory power driver’s seat, 4-way power passenger seat, Driver’s Information Center, automatic climate control
1988 Coupe (KA3) - C27A - Power sliding sunroof
1988 Coupe L (KA3) - C27A - Driver’s Information Center, security system, automatic climate control, anti-lock brakes
1988 Coupe LS (KA3) - C27A - Driver’s side airbag, Bose audio system, 4-way power memory seats
1989-1990 Sedan (KA4) - C27A - Driver’s side airbag
1989-1990 Coupe (KA4) - C27A - Driver’s side airbag
1989 Coupe L (KA4) - C27A - 6-way memory power driver’s seat
1989 Coupe LS (KA3) - C27A
1990 Sedan (KA4) - C27A - Body-colored power heated mirrors
1990 Coupe (KA3) - C27A - Body-colored power heated mirrors
1990 Sedan LS (KA4) - C27A - Wood center console, fog lights, CD player/changer
1990 Coupe LS (KA4) - C27A - Body-colored rear spoiler, wood center console, fog lights, gold alloys, front end cover, CD player/changer

Drivetrain
Engines (JDM/EDM-spec)
C20A - 2.0L SOHC V6
Horsepower: 143 @ 6300 rpm
Torque: 127 @ 5000 rpm
Compression Ratio: 9.2:1
Bore/Stroke: 82x63mm

C20AT - Turbocharged 2.0L SOHC V6
Horsepower: 187 @ 6000 rpm
Torque: 177 @ 3500 rpm
Compression Ratio: 9.0:1
Bore/Stroke: 82x63mm

C25A - 2.5L SOHC V6
Horsepower: 163 @ 6000 rpm
Torque: 155 @ 4500 rpm
Compression Ratio: 9.0:1
Bore/Stroke: 84x75mm

C27A - 2.7L SOHC V6
Horsepower: 177 @ 6000 rpm
Torque: 166 @ 4500 rpm
Compression Ratio: 9.0:1
Bore/Stroke: 87x75mm

* Footnote: Both C20A engines (NA and Turbo) use the same cams, but different crankshafts.

Engines (US-spec)
C25A - 2.5L SOHC V6
Horsepower: 151 @ 5800 rpm
Torque: 154 @ 4500 rpm
Compression Ratio: 9.0:1

C27A - 2.7L SOHC V6
Horsepower: 161 @ 5900 rpm
Torque: 162 @ 4500 rpm
Compression Ratio: 9.0:1

What kind of gearboxes were available in the Legend?
There were several different gearboxes fitted to the Legend. The 5-speed manual had the following ratios:
C20A - 3.250/1.857/1.346/1.033/0.794/R 3.000/Final 4.200
JDM/EDM C25A - 2.923/1.789/1.222/0.909/0.702/R 3.000/Final 4.200
US C25A - 2.923/1.789/1.259/0.968/0.750/R 3.000/Final 4.200
US C27A - 2.923/1.789/1.222/0.909/0.702/R 3.000/Final 4.200

The 4-speed automatic had the following ratios:
1986-1987 C20A - 2.647/1.555/0.971/0.682/R 1.904/Final 4.400
1988-1990 C20A - 2.705/1.629/1.058/0.750/R 1.904/Final 4.533
C20AT - 2.764/1.500/0.972/0.707/R 1.904/Final 4.714
JDM C25A - 2.647/1.464*/0.971/0.682/R 1.904/Final 4.200
JDM C27A - 2.647/1.448/1.028/0.707/R 1.904/Final 4.266
US C27A - 2.647/1.555/1.028/0.777**/R 1.904/Final 4.266
*US C25A had a 1.555 gear
**Coupes had a 0.707 gear

Chassis
How is the Legend suspension set up?
The initial suspension system of the Legend used MacPherson struts with unequal-length control arms in front and a semi-trailing arm design in the rear. Antisway bars measured 26.5mm front and 12.5mm rear. In 1987, the coupe debuted with MacPherson struts front and rear and 27.4mm front/14.7mm rear antisway bars, and in 1989 the sedan followed suit. Steering is rack-and-pinion, with speed-sensitive power assist and an overall ratio of 15.9:1 on the coupes and 17.6:1 on the sedans.

What kind of brakes does the Legend have?
Every Legend has four-wheel disc brakes. The vented front rotors on 1986-1987 sedans measure 10.3 inches (262mm) in diameter and the solid rear rotors measure 10.16 inches (258mm). Sedans from 1988-1990 and all coupes upgraded to 11-inch (280mm) rotors in the front. ABS was available on L and LS models.

What are the factory wheel and tire sizes for the Legend?
All models are fitted with 205/60R15 tires, with several different wheel options. The 1986-1988 sedans were equipped with 6.5x14-inch 16-spoke alloys, all coupes used a 20–spoke turbine design, and 1989-1990 sedans came with 20-spoke alloys. Optional on the 1990 LS coupes were special gold “throwing star” alloy wheels. A JDM option was a white-painted version of the 1986-88 16-spoke wheels.
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Old 06-06-2009, 02:23 PM   #9
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As I read in one post the G1 forum needed a FAQ. So as I sit here bored in directed study almost done wit my sophomore year in high school I decide to write this FAQ. I have no idea where to start as there are many questions. Here you go. Most of this is from daddymack117 , I just did a lot of copy/past from all around the forum, as I have some time in school. So only som of this is written BY me.

Gas Mileage- Some people worry about there mileage. You must understand you have 6 cylinders under that hood, not four. You should be getting at least 18-23 city and 24-27 highway. Now ways of getting better. Adding gas treatment that cleans valves, injectors, or improve fuel quality do help. But upgrading to say a CAI (cold air intake)or even a high flow filter works great along with an exhaust system(2 seems to work great for our legends).Adding CAI and exhaust increased my mileage to 34 on highway.Other than that regular unleaded gas gives much better mileage compared to the low grade with 10% ethanol in it.

Main Relay- Location for this is under the driver side dash, and is a little black box-OEM part number for main relay- MITSUBA RZ-0063. It has an 8 pin socket with the #6 pin missing. (so the 7 pin on this link http://www.theautochannel.com/autopa...egraitems.html) www.acuraparts247.com some may prefer to get a main relay from a wrecker or salvage yard. Probably cost about $5.00. Symptoms for Bad Main Relay-
1. Car wont start off its own but if jump started, will fire right away.
2. Not clicking when turning key.
3. If you have Ground but no Power.
*note-A main relay usually only fails when the weather is really hot. You might have a hard start every now and then, but not enough to really cause you any concern, but when an igniter or a coil fails, the car won't start at all until it cools down and that will be a major concern.

O2 sensors- O2 sensors calculate how much oxygen is in your engine. They can cause your engine to burn rich, lien, poor, etc. These also cause bad gas mileage. Replacement:

Type of Car Mileage Replacement Interval Recommended
Unheated oxygen sensors on 1976 to early 1990s vehicles-Every 30,000 - 50,000 miles
Heated (1st generation) oxygen sensors on mid-1980s to mid-1990s vehicles Every 60,000 miles
Heated (2nd generation) oxygen sensors on mid-1990s and newer vehicles Every 100,000 miles

Types of O2 sensors-
Unheated Thimble: This was the first oxygen sensor design and Bosch has been producing them since 1976. These sensors either have one wire or two (for purposes of grounding), since they do not require power for a heater element. They use a zirconia ceramic element to generate a voltage in a rich (insufficient oxygen) gas environment. They can take several minutes to reach operating temperatures of 625 degrees Fahrenheit after a cold start, however this varies with application as the location of the sensor determines the rate at which it heats.

Heated Thimble: These sensors were introduced by Bosch in 1982 and function in the same manner as the unheated thimble, however inside the thimble is a special heating element that brings the sensor up to operating temperature in about 30-60 seconds. The additional wires to power the heater- typically a total of 3-4 wires (dependent on grounding scenario) can identify these sensors.

Planar: This sensor was introduced by Bosch in 1997 and also uses the zirconia ceramic sensing technology, but placed in a more compact thin flat shape (hence the name) instead of a thimble or conical shape. This allows the sensor to be smaller and lighter. They also require less electrical power as the heater is integrated into the smaller sensing element. By model year 2004, planar oxygen sensors are expected to account for over 30% of all new oxygen sensor applications and by 2007 for over 50% of new oxygen sensors. These sensors also have only four wires.

Wideband: This is the newest design of oxygen sensor and it offers the increased accuracy needed to meet the latest emissions requirements. Unlike all the other types of oxygen sensors, the wide-band sensor can actually measure the air/fuel ratio from 11:1 (excess fuel condition) all the way to straight air (no fuel)! (The ideal air/fuel ratio is 14.7/1.) This improved measurement allows the engine control system to measure the actual air/fuel ratio and eliminates the switching between lean and rich associated with a traditional type of oxygen sensor. These sensors use a planar zirconia ceramic element, so that they heat up much faster than other types of sensors- reducing cold start emissions. These sensors can be identified with having five or more wires. In addition, these sensors are used with the newly developed gasoline direct injection engines. Direct injection engines can use stratified charges, which produce a very lean mixture in the combustion chamber, and these sensors must be used because of their ability to measure from very lean to very rich accurately.

Titania: These sensors use a different type of oxygen sensing technology and instead of generating a voltage signal that changes with the air/fuel ratio, the sensor’s resistance changes. These sensors are used on less than 0.5% of all oxygen sensor equipped vehicles.

Most O2 sensors run for about $40.00. Sadly on our legend we need 2. for both manifolds. Links to some sites www.boschusa.com , www.ngk.com , www.ebay.com

Maintinence-
Every 250 miles or weekly

Check engine oil
Check engine coolant level
Check windshield washer fluid
Check brake fluid level
Check tires and tire pressures

Every 3,000 miles or 3 months

Above listed items plus:

Check power steering fluid level
Check automatic and transmission/transaxle fluid level
Change engine oil and filter

Every 7,500 miles or 6 months

All items listed above and:

Inspect/replace wiper blades
Check/Service Battery
Check/Adjust (if necessary) engine drivebelts
Inspect/Replace (if necessary) all underhood hoses
Check cooling system
Rotate Tires
Check front disc brake pads

Every 15,000 miles or 12 months

All items listed above and:

Inspect the brake system
Check clutch pedal height and freeplay
Inspect the seatbelts
Replace the a/c air filter
Adjust valve clearances
Replace the air filter
Inspect the fuel system
Check m/t lubricant
Check differential lubricant level
Inspect suspension and steering components and driveaxle boots
Inspect exhaust system

Every 30,000 miles or 24 months

All above listed items plus:

Replace the spark plugs (conventional, non-platinum)
Check and replace, if necessary, the PCV Valve
Replace the fuel filter
Service the cooling system (drain, flush, fill)
Replace the brake fluid
Change automatic transmission/transaxle fluid
Change manual transmission/transaxle lubricant
Change differential lubricant
Check EGR system ( Exhaust Gas Recirculation)
Check and adjust engine idle speed
Check and adjust engine ignition timing

Replace ABS high pressure hose
Reset Maintenance Required Indicator

Every 60,000 miles or 24 months

All items listed above plus

Replace the spark plugs (PLATINUM TIPPED SPARK PLUGS)

Every 90,000 miles or 72 months

Replace timing belt
Replace water pump
PCV Valve, Cover, Filter

Chassis Codes
KA2 - Refers to 86-87 Sedan
KA3 - Refers to 87-90 Coupe
KA4 - Refers to 88-90 Sedan
KA7 – Refers to 91-95 Sedan
KA8 – Refers to 91-95 Coupe
KA9 - Refers to 96-04 RL
KB1 - Refers to 05-?? RL

1st Generation: 86-90 Sedans/Coupes
2nd Generation: 91-95 Sedans/Coupes (96 JDM Coupe)
3rd Generation: 96-04 Sedans only (Acura RL)
4th Generation: 05-?? Sedans only (Acura RL)


USDM: United States Domestic Market
JDM: Japanese Domestic Market
EDM: European Domestic Market

OEM: Original Equipment Manufacturer (basically used to refer to factory parts)
AEM: Aftermarket Equipment Manufacturer (literally). They make aftermarket stuff. Nothing specifically for the Legend though.

FWD Front Wheel Drive
RWD Rear Wheel Drive
AWD All Wheel Drive

.
1st Generation: 86-90 Sedans/Coupes
2nd Generation: 91-95 Sedans/Coupes (96 JDM Coupe)
3rd Generation: 96-04 Sedans only (Acura RL)
4th Generation: 05-?? Sedans only (Acura RL)


USDM: United States Domestic Market
JDM: Japanese Domestic Market
EDM: European Domestic Market

OEM: Original Equipment Manufacturer (basically used to refer to factory parts)
AEM: Aftermarket Equipment Manufacturer (literally). They make aftermarket stuff. Nothing specifically for the Legend though.

FWD Front Wheel Drive
RWD Rear Wheel Drive
AWD All Wheel Drive

Blown Head Gasket
- Commonly known as BHG(Overheating 101) This is mainly an overheat and causes the Head Gasket to blow out causing oil in coolant/coolant in oil. There will usually be white smoke coming out of the exhaust on idle or acceleration.

VSS- this is your vehicle speed sensor. If you speedometer is going completely whacky or reads 0 mph , this us your vss. From your dealer it should run you around $150-$300 depending on where you go. Most likely cheaper from salvage yard, wrecker, etc.
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Vehicle Identification (VIN)

The following is a breakdown of what your 17-digit Acura Legend Vehicle Idenfication Number (VIN) denotes:

Digit 1-3 - Manufacturer
JH4 = Honda Motor Co. LTD

Digit 4-6 - Body Type
KA1: Japan-spec sedan (RHD), 1986-1988
KA2: Japan-spec sedan (RHD), 1986-1987
KA2: European/Australian-spec sedan (RHD/LHD UK), 1986-1987
KA2: American-spec sedan (LHD), 1986-1987
KA3: Japan-spec coupe (RHD), 1987-1990
KA3: European/Australian-spec coupe (RHD/LHD UK), 1987-1990
KA3: American-spec coupe (LHD), 1987-1990
KA4: Japan-spec sedan (RHD), 1988
KA4: European/Australian-spec sedan (RHD/LHD UK), 1988
KA4: American-spec sedan (LHD), 1988-1990
KA5: Japan-spec sedan (RHD), 1989-1990
KA6: Japan-spec sedan (RHD), 1989-1990
KA7: 91-95 4 Door Sedan
KA8: 91-95 2 Door Coupe
KA9: 96-04 RL

Digit 7 - Body Style/Transmission Type
1 = coupe, manual
2 = coupe, automatic
5 = sedan, manual
6 = sedan, automatic


Digit 8 - Option/Trim Package
3 = 86-90 Standard (No Sunroof)
4 = 86-90 Standard (Sunroof)
5 = 86-90 Leather Interior
6 = 86-95 L Trim
7 = 86-95 LS Trim
8 = 93-95 GS Trim
9 = 93-95 SE Trim

Digit 9
Check digit

Digit 10 - Production Year
G = 1986
H = 1987
J = 1988
K = 1989
L = 1990
M = 1991
N = 1992
P = 1993
R = 1994
S = 1995

Digit 11 - Assembly Plant Location
C = Saitama, Japan

Digit 12-17
Individual vehicle serial number

ECU Codes-

Getting that little Check Engine lights on your dash may seem a little discomforting. In reality it is really a miracle of engineering and computer technology. Instead of randomly pocking in vast amounts of wires, sensors, and mechanisms in such complex car as a Legend, this little light tells you that your computer knows exactly what is wrong with the car (most of the time).

That means the exact sensor or gate has been pin-pointed as being either partially disconnected or simply out of acceptable range.

Location of ECU on 1986-1990 Legends

The control unit is located under the passenger seat on sedans and under the passenger foot well carpet on the coupes.
The engine CPU is the form of an aluminum box with a little plexiglass window. All you have to observe is a little red LED.


Extracting Codes

With the car either running or the key in the ON position, perform the necessary steps above and observe the blinking of the light. The light will blink displaying all the codes in sequence and then repeating them.

Reading Codes
The code numbers are read by counting the number of blinks between longer pauses. On 1986-1990 Legends, the code number is indicacted by a series of rapid LED blinks between longer pauses.

The position of codes in a sequence can be helpful in doing diagnostics. A display showing 1-1-1-pause-9-9-9 indicates two problems occurring at different times. A sequence showing 1-9-1-9-1-9 indicates two problems occurring at the same time.

Resetting ECU

Sometimes it may be useful to reset the ECU memory. Although that maybe done by removing the battery for around 20 minutes or so, this will also kill your clock and radio presets. A more elegant way is to:

on 86-90 Legends remove the alternator fuse for 20 seconds.
on 91-95 Legends remove the ACG fuse in the interior fuse panel for 20 seconds. (note that this will also clear the seat memory)

Aftermarket ECU-Chasing after an aftermarket ecu for the g1 is almost impossible. You either need a piggyback systerm from AEM or if you can get ahold of the BAYOU company then you might be in luck.


-- ------------------------------------------------------------------------------

Below are trouble codes for 86-95 Acura/Honda Legends:

1986-1990 Legend (G1)
Code # Explanation
1 Front Oxygen Sensor
2 Rear Oxygen Sensor
3 Manifold Absolute Pressure Sensor
5 Manifold Absolute Pressure Sensor
4 Crank Angle Sensor
6 Coolant Temperature Sensor
7 Throttle Angle Sensor
8 Top-Dead-Center Position Sensor
9 Number 1 Cylinder Piston Position
10 Intake Temperature Sensor
12 E.G.R. System
13 Atmospheric Pressure Sensor
14 Electronic Idle Control Module
15 Ignition Output Signal
17 Vehicle Speed Sensor
18 Ignition Timing Adjustment

Wheel offset and bolt patter-Wheel offset is 50mm. Bolt pattern is 4x114.3 mm to be exact.most people with aftermarket rims have an offset of +41.

Engine Swaps- In theory, if you have the time (and money), just about any engine swap is possible, just most will require extensive bodywork, engine bay work, pain, and suffering, so again unless you have money burning a hole in your pocket, most swaps with other Honda/Acura engines should not be attempted. On the other hand, there are a few exceptions to what can be swapped and what can't:

USDM C27A1---->JDM C27A1(vice versa)

USDM C27A1---->USDM C27A1

Trim Levels-The G1 Legend was offered in three trim levels. The STD (also known as "standard" or "base") was the entry-level car. Despite that status, it came standard with full power accessories, sunroof, AC, cruise control, tilt steering column, and cassette stereo with equalizer. The L model adds anti-lock brakes (ALB), heated exterior mirrors, a power driver's seat, leather, and leather-wrapped steering wheel,automatic climate control and also a trip computer. The top of the line LS model adds a power passenger's seat, trip computer, automatic climate control,air bags and a Bose stereo system.

Lifter valves-Lots of people wonder why there car "ticks" when it runs in the morning. Oil is needed to run through the lifter and the oil is usually cold in the morning so it has very high viscosity causing ticking, once the oil is heated up it will run through them causing the ticking to go away.To alleviate the noise, pour a half quart of Honda ATF through the crankcase and run engein for about 15 min. Then change oil and filter.A Product such as Engine Restore or Marvel Mystery Oil can be ran through after change.

specs on road-A sedan with the 2.5 will hit 60 in 8.1 seconds with the five-speed manual. The quarter mile time is 16.41 at 85.6 mph. A coupe will do the quarter mile in 16.40 @ 87.5 mph, and has a 0-60 time of 8.12 seconds. This is also with the manual transmission. Automatic transmission cars are about a half a second slower to sixty. (NOTE: those stats are from the Motor Trend articles below. Results will vary based on temperature, road surface, and production variances, among other things.)

Tranny- The transmission is virtually what makes the car move.No tranny=no movement. symptoms of bad automatic tranny, on startup the engine will rev over redline and hit rev limiter. It may be fixed by the 4x flush(flushing tranny 4 times).Other signs of tranny problems would be shifting troubles. To fix this, you may simply clean out the shift solenoids. http://www.geocities.com/jeffcody420/cai.htm <----thanks to Full Stealth. Now the manual tranny is pretty simple. Gearbox,master cylinder,slave cylinder,clutch,cable,flywheel,etc. not many way to fix these if broken. Only thing to really do is flush it and hope for the best.
Feel free to add/stomp/tell me whats missing(i know im missing stuff but this took a while LOL)

Acura Legend fact sheet.(stolen from G2 section)
ACURA FACT SHEET
Integra Legend CL RL TL NSX Vigor SLX MDX
(Technical Service Bulletins are listed in parentheses below.)

Brakes: Parking brake does not fully release, 1993-94 Vigor (94-001); ABS Problem Code 1 & leaking solenoid, 1987-90 Legend (89-022), 1990-91 Integra (91-038) & 1991-92 NSX (92-014); Brake squeal, 1986-88 Legend (87-028) & 1986-87 Integra (87-011); ABS pump runs often, 1987-89 Legend (89-029); ABS reservoir overflows, 1987-89 Legend (89-016);.

Electrical/Instruments: Speed sensor failure, 1991-94 Legend (94-018); Unlocking door sets off security alarm, 1991-93 NSX (93-007); Glove box light stays on, 1991-92 Legend (92-026); ABS problem code 1-8, 1991-92 Legend (91-031 & 92-023); Driver's power seat memory loses position, 1989-90 Legend (92-015); Low oil pressure flashes, 1986-90 Legend (90-013); Premature battery failure, 1986-89 Integra (91-003); Fuel temperature gauges erratic, 1988-90 Legend (90-012); Low charge rate, 1986-88 Legend (89-018); Information center displays: Distance to empty -- N/A, 1988-89 Legend (89-010); Inaccurate readout from information center, 1987-88 Legend (87-021); Ignition key/sunroof warning beeper stays on, 1986-87 Legend (86-017).

Engine/Driveability: Knock after cold start at 12-1500 rpms, 1991-93 Legend (93-006); Exhaust system rattle, 1986-91 Integra (91-051); Camshaft oil seal leak, 1990-91 Integra (91-005); Snapping valve noise, 1990-91 Integra (91-008); No start - Igniter failure, 1988-89 Integra (93-003); Excessive cranking to start, 1986-89 Integra (89-032).

Suspension/Steering: Vehicle speed sensor failure, 1991-94 Legend (94-018); Steering wheel shimmy, All Acura models (94-010); Car drifts to side, 1991 Legend (91-047 & 1992 vigor (92-024); P/S pump "swooshing" noise, 1991 Legend (91-034); Off center steering wheel adj. All to 1990 (90-007); Steering wheel vibrates during pre-delivery inspection test drive, All Acura models to 1990 (90-006); Front steering knuckle clunk, 1986-87 Legend (87-033); Front suspension noise, 1986-88 Legend (87-010).

Transmission: Clicking noise while turning, 1986-93 Integra/1986-95 Legend (92-009); Shudder during up/downshifts, 1986-87 Legend (88-001); No upshift past 2nd gear in A/T, All Legend to 1988 (88-008); A/T final drive noise, 1986-87 Legend (88-008); Upshift flare from 2nd to 3rd gear, 1988-89 Integra (89-031);

Other: Tire noise, 1986-88 Legend (89-007); Buzzing noise from emissions control box (A/T), 1991-92 Legend (92-021).

Last edited by sam o nela; 01-08-2010 at 09:44 AM.
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