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Old 09-16-2009, 11:44 PM   #1
DallasLedge89
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Default Steve's Idle Adjust Screw Problem

"Does anyone know how to make the idle increase other than adjusting the screw on the TB? I have mine unscrewed all the way (I have also taken the screw out and cleaned both the screw and inside the hole), I have cleaned the EAICV, checked the FIV, put in new O2's, there are no codes on the ECU and the idle is still too low (got the flashing yellow light on the ECU) Pretty much everything has been replaced so I am clueless at this point. Perhaps the TB needs disassembling?"

Noticed this at the end of Steve's valve guide seals post on the old site, to which there was no reply. (back in 2-09)

So here's a reply...

I had a similar situation a while back, so I removed the TB from the intake manifold and gave it the best cleaning I could, specifically the little drillings and passages that you really can't get to without removal of the TB. Found a bit of hard, black build-up in the throat and in the small air passage drillings.

Used spray carb cleaner, #0000 steel wool, and a small bare wire/toothpicks. Also replaced the O-ring on the brass adjusting screw. Had to guess on the O-ring size as the dealerships won't sell the O-ring seperately, only the adjuster screw with the O-ring attached. Pricey, of course.

After reassembly, I found that it was necessary to screw the adjuster screw all the way in and then turn it back out only 1/4 turn to get the correct idle speed.

Worked great for me.
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Old 09-17-2009, 09:57 AM   #2
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You can try and finagle the timing a wee bit... other than that, just make sure all intake vacuum lines are intact!
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Old 09-17-2009, 11:51 AM   #3
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And also, you might also want to adjust the butterfly too in the throttle body if you can
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