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High idle?

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Old Jul 24, 2010 | 12:14 PM
  #1  
iroc stangs's Avatar
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From: Tigard, OR
Car: 87 iroc-z camaro
Engine: 305TPI
Transmission: 700R4
Axle/Gears: G92 3.23 posi
High idle?

i notice when the car is idiling it seems pretty high but anyhow when i put it in gear, the rpms will drop a bit and when you release off the brakes it will move you without any need in gas one bit, even in a decent sloped driveway. If she's idiling for a few minutes it will slowly get a lower idle, but it will also when idiling, idle high for a sec. then lower down and then idle higher again. Is this normal? i'll add a vid with the start up, idle, and gear idle.

ok the vid i will post shows her starting up/idiling. then placing in reverse, then nuteral and back and forth one more time. then starting at park position, all the way down and back up. and then more idle

heres the vid

Last edited by iroc stangs; Jul 24, 2010 at 12:52 PM.
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Old Jul 25, 2010 | 04:45 AM
  #2  
Chevy86 IROC-Z's Avatar
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From: Far West
Car: 1986 Camaro Z28 IROC-Z
Engine: 350 Tuned Port Injection, for now.
Transmission: 700R4
Axle/Gears: Posi - 3.23
Re: High idle?

Fuel injected vehicles do just that. You let of the brake and she will go as fas as 15 mph when cold because it'll be in open loop. Seems like one of 3 things may be going on;
1. the TPS is going bad
2. the IAC valve is going bad
3. there is a vacuum leak

Are there any trouble codes (SES Light on)?

Follow this link to fine tune the IROC. Then come back and tell me your results.

1. http://www.highperformancepontiac.co...gta/index.html
2. http://mpikas.blogspot.com/2008/08/t...june-2000.html
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