Idle issues persist
Thread Starter
Instructor
Joined: May 2014
Posts: 237
Likes: 0
From: Florida
Idle issues persist
My original problem with my 1995 vette was when it was cold it would tend to idle down a lot when it was cold, and worse when i turned on the ac. Well I cleaned it and it helped a lot and it only did it when i turned on the ac. After it's fully warmed up I don't really have a problem with it. SO since the problem was still there I purchased a new IAC motor and put it on yesterday. Same problem. I did the little reset procedure where you press the pedal and start and all that and it's STILL present. This is especially bad since it's a stick. This car is stressing me out. What should I do?
Drifting
Joined: Jun 2013
Posts: 1,590
Likes: 60
From: ft myers FL/Munising MI
.with a new Iac...i think you should do the min idle adj....it's done with the iac disconnected...make sure it's in time....but....the ecm should turn up the idle with the a/c on...also fans....you may have another issue...good luck....paul
Drifting
Joined: Jun 2013
Posts: 1,590
Likes: 60
From: ft myers FL/Munising MI
if you're going to be tinkering....it's a easy procedure, just follow the steps...the IaC gets disconnected during this procedure...Paul
Thread Starter
Instructor
Joined: May 2014
Posts: 237
Likes: 0
From: Florida
Is this it?
1) With the engine off, ground the diagnostic terminal of the ALCL under the dash.
2) Turn on the ignition to ON but do not start the engine....wait at least 30 seconds.
3) With the ignition still on, disconnect the IAC electrical connector.
4) Remove the ground from the diagnostic terminal of the ALCL and start the engine.
5) Assuming you did not have to adjust the idle RPM's.....turn the ignition to OFF and reconnect the IAC valve connector.
is this something I can do with the paper clip I hear works? if so, how?
should I leave the ac off or on?
1) With the engine off, ground the diagnostic terminal of the ALCL under the dash.
2) Turn on the ignition to ON but do not start the engine....wait at least 30 seconds.
3) With the ignition still on, disconnect the IAC electrical connector.
4) Remove the ground from the diagnostic terminal of the ALCL and start the engine.
5) Assuming you did not have to adjust the idle RPM's.....turn the ignition to OFF and reconnect the IAC valve connector.
is this something I can do with the paper clip I hear works? if so, how?
should I leave the ac off or on?
Drifting
Joined: Jun 2013
Posts: 1,590
Likes: 60
From: ft myers FL/Munising MI
Is this it?
1) With the engine off, ground the diagnostic terminal of the ALCL under the dash.
2) Turn on the ignition to ON but do not start the engine....wait at least 30 seconds.
3) With the ignition still on, disconnect the IAC electrical connector.
4) Remove the ground from the diagnostic terminal of the ALCL and start the engine.
5) Assuming you did not have to adjust the idle RPM's.....turn the ignition to OFF and reconnect the IAC valve connector.
is this something I can do with the paper clip I hear works? if so, how?
should I leave the ac off or on?
1) With the engine off, ground the diagnostic terminal of the ALCL under the dash.
2) Turn on the ignition to ON but do not start the engine....wait at least 30 seconds.
3) With the ignition still on, disconnect the IAC electrical connector.
4) Remove the ground from the diagnostic terminal of the ALCL and start the engine.
5) Assuming you did not have to adjust the idle RPM's.....turn the ignition to OFF and reconnect the IAC valve connector.
is this something I can do with the paper clip I hear works? if so, how?
should I leave the ac off or on?
Thread Starter
Instructor
Joined: May 2014
Posts: 237
Likes: 0
From: Florida
my car is a stick with a lt1 and a good cam and everything and it likes at least 1000 rpm
ok i have a 16 pin connector...what am i supposed to connect my paper clip to?? I've looked but there's no clear word on it. will this even work for me dude?
ok i have a 16 pin connector...what am i supposed to connect my paper clip to?? I've looked but there's no clear word on it. will this even work for me dude?
Last edited by Hairy W Bush; May 27, 2014 at 07:22 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
Drifting
Joined: Jun 2013
Posts: 1,590
Likes: 60
From: ft myers FL/Munising MI
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Disclaimer: Things changed a lot over the years and your car may not have that switch. If not, then it must use some other method to tell when the AC is on and increase the idle speed.
Thread Starter
Instructor
Joined: May 2014
Posts: 237
Likes: 0
From: Florida
I can rule out the TPS. When I disconnected it the problem is still there. Push the ac button and that idle DROPS. Again, this problem is still there with the ac off. I go to take off from a stop and it stumbles because of this. it doesn't even register the throttle much so i have to raise the rpms with the clutch pedal pressed and then release it just to go. whatever it is it's also affecting my mpg. i tried a smoke test for vacuum leaks and found nothing. MAF has already been cleaned as well as the air filter.
please help my last resort is a mechanic. :\
please help my last resort is a mechanic. :\
Advanced
Joined: Jun 2023
Posts: 66
Likes: 3
From: Orlando
Still can’t get it working
My mechanic was here yesterday. We hooked up the pressure controls and went for a drive and we are blown away that the compressor keeps going off when we takeoff to drive but when we slow down and sit at a light, it turns back on.
I took the new climate control module that I bought and sent it to Batee .com to be rebuilt. When that comes back, we will see what happens. Definitely can’t figure this out.
I took the new climate control module that I bought and sent it to Batee .com to be rebuilt. When that comes back, we will see what happens. Definitely can’t figure this out.
Moderator
Joined: Jul 2005
Posts: 28,817
Likes: 819
From: Parrish FL
St. Jude Donor '06 thru '26
My mechanic was here yesterday. We hooked up the pressure controls and went for a drive and we are blown away that the compressor keeps going off when we takeoff to drive but when we slow down and sit at a light, it turns back on.
I took the new climate control module that I bought and sent it to Batee .com to be rebuilt. When that comes back, we will see what happens. Definitely can’t figure this out.
I took the new climate control module that I bought and sent it to Batee .com to be rebuilt. When that comes back, we will see what happens. Definitely can’t figure this out.