Wont hold idle
Thread Starter
Instructor
Joined: Sep 2002
Posts: 219
Likes: 0
From: The Colony Tx
Wont hold idle
Anyone have any ideas on why my vette wont hold idle. When i am in car and applying a little pedal it idles fine. When I let up on peddle all the way it stalls. I only have to apply a little pressure to the gas pedal to maintain and idle.
Any suggestions
Any suggestions
Drifting
Joined: Aug 2002
Posts: 1,775
Likes: 125
From: Birmingham AL
Re: Wont hold idle (aroulette)
When did it start having this problem? Any recent work done? Has the plug been removed from the min. air screw on the side of the tb? Is the throttle position sensor set to .54V(if it is adjustable-I don't know if '90's are or not).
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
Re: Wont hold idle (aroulette)
The screw is factory set and still should be unless you have messed around with it. However, the TPS may have gone out of range. That's why the suggestion to check the voltage to be sure it is within spec. If all is good, then then I'd be looking hard at the IAC.
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
Drifting
Joined: Jul 2001
Posts: 1,751
Likes: 1
From: Miami, FL, USA
Re: Wont hold idle (aroulette)
In the tech tips, there is a procedure for resetting the idle. Follow the steps. If you dont know what the TPS or IAC are, then you should buy a repair manual, or have someone help you out.
It sounds like this car has not given you any trouble before, or you would surely know what these things are!
It sounds like this car has not given you any trouble before, or you would surely know what these things are!
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
Re: Wont hold idle (aroulette)
TPS= throttle positioning sensor (on the pass side of the tb)
IAC= idle air control (located just below the TPS on the tb.)..this is controled by the computer (ECM) ....the ECM sets the idle speed (IAC) by reading the TPS, IAT( air intake sensor) and CTS (coolant temp sensor)..You have just had traning in sensor 101 class. :D :jester
By all means, get the Helms manuals for the car.
IAC= idle air control (located just below the TPS on the tb.)..this is controled by the computer (ECM) ....the ECM sets the idle speed (IAC) by reading the TPS, IAT( air intake sensor) and CTS (coolant temp sensor)..You have just had traning in sensor 101 class. :D :jester
By all means, get the Helms manuals for the car.
Burning Brakes
Joined: Apr 2002
Posts: 755
Likes: 0
From: Patterson CA
Re: Wont hold idle (FoolCrzy)
there is a detailed procedure somewhere.....maybe in tech tips....
https://www.corvetteforum.com/techti...D=55&TopicID=2
:thumbs:
Thread Starter
Instructor
Joined: Sep 2002
Posts: 219
Likes: 0
From: The Colony Tx
Re: Wont hold idle (VetBoy89)
ok I looked at IAC and TPS and visually look ok. Did notice the TPS had a strap tie around it holding connector in place. Not sure I understand the testing procedure from the chilton book. Anyone have simple instructions?
Thread Starter
Instructor
Joined: Sep 2002
Posts: 219
Likes: 0
From: The Colony Tx
Re: Wont hold idle (aroulette)
OK
Last ditch effort I turned the screw in the throttle and sure enough it is adjustable and now holding idle.
Also, after the distributor rebuild, it is incredibly more responsive. I also had to replace rotor and cap. Thanks for everyones input
I think I am going to take advise and clean TB. make a difference?
Last ditch effort I turned the screw in the throttle and sure enough it is adjustable and now holding idle.
Also, after the distributor rebuild, it is incredibly more responsive. I also had to replace rotor and cap. Thanks for everyones input
I think I am going to take advise and clean TB. make a difference?
Melting Slicks
Joined: Jan 2002
Posts: 2,784
Likes: 3
From: Atlanta GA
Re: Wont hold idle (aroulette)
OK
I think I am going to take advise and clean TB. make a difference?
I think I am going to take advise and clean TB. make a difference?
