installed a FAST 90

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Dec 19, 2008 | 10:54 AM

cammin z

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Teching In

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From: the woodlands

installed a FAST 90

okay sooo i just installed my fast 90 setup...my cars untuned/longtubes/exhaust only but the car idles at like 1300rpm??? and the idle jumps up and down...like 2000rpm to 1000 to 1300??? its nuts im guessing a vacume problem? im not sure anyone ever have this happen?
any help would be great help

thanks thomas

Dec 19, 2008 | 11:56 AM

teke184

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From: Key West, Florida

did you try an idle relearn?

most likely it needs a tune to get the IAC set up right.

i was told you can fiddle with the throttle stop adjustment to get it to idle better. but this is only a temporary band aid.

look into a tune.

Dec 19, 2008 | 06:32 PM

sidewayz28

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From: seattle

your probably going to need a tune. at least its idling a little higher then wanting to kill it self

Dec 19, 2008 | 10:50 PM

Avaric3

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From: Manalapan, NJ

doesnt sound like it needs a tune, just sounds like you gotta find a vaccuum leak

Dec 20, 2008 | 12:25 AM

SUX2BU

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From: DFW, TX

Did this on my first FAST 90mm install. you have to use the allen head black valley cover bolts that came with the intake. The stockers won't let the intake mount flush with the heads so you have a big vacuum leak.