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: 1,773
Likes: 123
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
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
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?
