High idle on LT1
Thread Starter
Teching In
Joined: Mar 2009
Posts: 10
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From: Syracuse, ny
High idle on LT1 Hi guys, on my 94 Z28, the cars idles around 1500 rpm, cold or hot. I've checked the throttle stop screw that the tab on the butterfly linkage would touch, the tab is touching the adjustment screw. Guessing theres some sort of electrical idle control solenoid somewhere? Whatcha think guys?
Teching In
Joined: Mar 2009
Posts: 26
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From: PA
ever clean your MAF ( mass air flow sensor). with a break fluid. after i got my 383 put in and a good tune , we found that the z's idle was still a bit high. took that off cleaned it, ran like a baby. hope i could help. let me know
If you have a tool that can log the car check your IAC (Idle Air Control) counts, thats what controls the idle speed. Fully open is 0 and fully closed is 160. Warm idle should se 30-50 counts.
Tony.
TECH Regular
Joined: Oct 2008
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From: Bahrain
TECH Regular
Joined: Sep 2008
Posts: 443
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From: tampa
if not a bad vacuum leak could cause a high idle. that happened after i took a little too much meat off of the stock TB
so check vac lines.
did you do anything to the car recently?
