vette will not idle..???
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 2,295
Likes: 14
From: Grand Sport #82
vette will not idle..???
My 87 will not idle..When I crak it and the engine starts up, it revs up like normal, and then dies, if idont apply throttle.
When I drive around, and does a corner, without the foot on the pedal it dies too...
What do I need to check here?!?!
I have been told that a "computer" handels the idle, so notning can be done.....
The car runs great, and have never had a problem like this before....
Anybody with an idea???
When I drive around, and does a corner, without the foot on the pedal it dies too...
What do I need to check here?!?!
I have been told that a "computer" handels the idle, so notning can be done.....
The car runs great, and have never had a problem like this before....
Anybody with an idea???
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
Two things-the idle is controlled by the IAC-and it can be cleaned, typically they get all carboned up and affect idle. Next, I'd be doing a leak down check on the injectors, to make sure they weren't leaking.Hope you have a Helms manual.
Le Mans Master
Joined: Dec 2002
Posts: 6,715
Likes: 2
From: Santa Teresa New Mexico
Originally Posted by rick lambert
Two things-the idle is controlled by the IAC-and it can be cleaned, typically they get all carboned up and affect idle. Next, I'd be doing a leak down check on the injectors, to make sure they weren't leaking.Hope you have a Helms manual.
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 2,295
Likes: 14
From: Grand Sport #82
Originally Posted by redwing76
IAC replace it.
again :o :o :o ..still learning
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Le Mans Master
Joined: May 2003
Posts: 5,203
Likes: 0
From: Las Vegas Nevada
Originally Posted by Lars87
Thanks, that drawing sure did help.
I will try to clean the IAC, I have been told that may help abit.
Is the IAC screwed in, or is it like a plug I can wiggel out?
I will try to clean the IAC, I have been told that may help abit.
Is the IAC screwed in, or is it like a plug I can wiggel out?
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 2,295
Likes: 14
From: Grand Sport #82
Originally Posted by Southern Comfort
Its screwed in and if you go that far.....replace it.
I hope that cleaning it will help, until i recive a new on.
Is it a big job? looks like its just " un-screw and replace"???
Last edited by Lars87; Mar 30, 2005 at 05:04 PM.
Race Director
Joined: Jan 2004
Posts: 18,727
Likes: 711
From: Bergen County, NJ
Originally Posted by Lars87
I hope that cleaning it will help, until i recive a new on.
Is it a big job? looks like its just " un-screw and replace"???
Is it a big job? looks like its just " un-screw and replace"???
To take the TB off, there 4 long bolts [10 MM] holding it on.
Disconnect the water hoses connected to # 61, they might be tuff to get off, you will spill some anti-freeze.
Disconnect the plug from the TPS [throttle position sensor] #20, but do not unscrew the TPS off the TB.
You may need a new gasket # 1.
You can probably leave the throttle cable attached while you change the IAC.
BTW, I know this because I did it myself.
Heres a pic of my old & new IAC.
Heel & Toe
Joined: Feb 2000
Posts: 22
Likes: 0
From: Lemoore, Australia
If that does not take care of it, you could be having a cold start injector issue(injector #9) If that is the case, IMO I would think about going to the 89 ARAP chip as it doesn't use a cold start injector and is a much better program.
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
If you do pull it to clean it DO NOT turn the pintle,if you do it will mess up the setting, Just get a tooth brush and some good carb cleaner for cleaning. It can be removed without removing the TB, you need an open end wrench for it. The IAC is a carbon magnet-you'll see.
Oh BTW here's a great web site to help you.
http://www.dvcorvettes.com/clean_air_passage.htm
Good Luck
Oh BTW here's a great web site to help you.
http://www.dvcorvettes.com/clean_air_passage.htm
Good Luck
Last edited by rick lambert; Mar 31, 2005 at 10:23 AM.
Le Mans Master
Joined: Dec 2002
Posts: 6,715
Likes: 2
From: Santa Teresa New Mexico
Originally Posted by DrSagan
If that does not take care of it, you could be having a cold start injector issue(injector #9) If that is the case, IMO I would think about going to the 89 ARAP chip as it doesn't use a cold start injector and is a much better program.
Intermediate
Joined: Mar 2005
Posts: 32
Likes: 0
Intake leak TPI 350
My 89 TPI 350 had a leak in the /intake manifold. Did basicly every thing recommended above. Started to tighten the intake manifold and behold half of the screws were loose. Could have saved a ton of $$$ if I would have started there. If you have a cross fire/ er miss fire, bless your heart! Any of you grus have a solution to my starting problem? Have a 89 that will start with a boost, run it for hours turn it off and try to start it again and it is as dead as a door nail. No lights, nothing. New battery, alt is cranking 14 volts. Everything looks good. Could I have a security brain box problem? or what. Acts like it just cuts everything off. Want to fix it so I can sell or trade it. Help!!! Wish you well JIM
Drifting
Joined: Nov 2000
Posts: 1,428
Likes: 1
From: Jacksonville FL
Originally Posted by Jim Monk
Any of you grus have a solution to my starting problem? Have a 89 that will start with a boost, run it for hours turn it off and try to start it again and it is as dead as a door nail. No lights, nothing. New battery, alt is cranking 14 volts. Everything looks good. Could I have a security brain box problem? or what. Acts like it just cuts everything off. Want to fix it so I can sell or trade it. Help!!! Wish you well JIM
I would have you check out the VATS system if you said that the lights and everything else works but won't crank or even engage the bendix on the starter.
Good luck and feel free to e-mail me if you want to kick around some ideas.
Mike.
Team Owner
Joined: Jan 2003
Posts: 20,324
Likes: 250
From: Summerland B.C. Canada
Originally Posted by xeugep
I hope this is my problem too. How much is an IAC at GM dealerships?
