NW 90 Installed-Now high idle

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Nov 8, 2007 | 03:00 PM

tee-boy

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NW 90 Installed-Now high idle

anyone have a solution to this problem of high idle after FAST 90/NW 90 install? I turned the idle screw all the way out and the TB still wants to stick open. Idle ranges from 1000-2000. I can turn the tb cam to shut it completely but once I give it some gas, it won't return to that position. Car is a 98.

Nov 8, 2007 | 04:50 PM

TheLS1Kid

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From: Orlando, FL

Sounds like a vaccum leak.

Do you have the throttle cable hooked up correctly?

Nov 8, 2007 | 05:38 PM

litle88

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From: Burbank, Illinois

I had the same crap happen to me!
I also had an untuned 85mm delphi MAFS and the tune is off, once you get it tuned its gonna change.

Nov 8, 2007 | 06:59 PM

tee-boy

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I'm not sure about the vacum leak or the tune. The problem seems to be that the blade won't completely shut. I can shut it completely w/ my hand by turning the tb cam and it will idle fine. However, once I get in car and give it some gas and let off it won't go back to that completely shut position. Also, I should add that I deleted the EGR pipe and put on block off plate. However, I haven't deleted it out of the computer (no tune software).

More info. Getting trouble codes P0405 (egr) and P0103 (MAF input is higher than expected for current engine operating conditions).

Last edited by tee-boy; Nov 8, 2007 at 08:19 PM.

Nov 8, 2007 | 09:07 PM

TheLS1Kid

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I think you need a tune.

Nov 8, 2007 | 10:13 PM

RedRallyeZ

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i just think that you lucked out and got a sticky TB, mabye somebody else can help out forom here, not sure what to do, but i just dont htink anybody has understood the probelem yet, mechanical not tune

Nov 8, 2007 | 10:47 PM

quiet_storm98

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From: Virginia

same thing happened to my car when i put on a stock ported throttle body, the car would idle at around 1100 and would sometimes slowly climb while it was idling..after i got it tuned it was fine