ASR and Idle Problems
Thread Starter
4th Gear
Joined: May 2006
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ASR and Idle Problems
See if any of you can figure this one out.
I have taken my 1996 Corvette convertible (LT1) to the Chevy dealing 3 times for the same problem. So far, it has cost me close to 900 bucks to not fix the problem. After the computer is reset the car runs very well. After a while the cars starts to do funny things. First, the SERVICE ASR light comes on. Then the car begins to idle just over 1,000 RPMS and the RPMS start to jump when driving the car over bumps in the road. The dealership has replaced a sensor here and there. Now they are trying to tell me that the wiring harness is no good and they want to replace it for over $2,000. I’m not ready to give in to that idea yet. I’ve read several ASR problem entries on this forum and there seems to be a wide variety of solutions to fix the problem, ranging from changing the brake fluid, to cleaning the sensors on the rear wheels and even replacing the ECM. Can an ASR problem like bad brake fluid directly influence the timing of the engine in neutral? Has anyone had this EXACT problem that can give me good advice on what to do? Thanks for you help!
I have taken my 1996 Corvette convertible (LT1) to the Chevy dealing 3 times for the same problem. So far, it has cost me close to 900 bucks to not fix the problem. After the computer is reset the car runs very well. After a while the cars starts to do funny things. First, the SERVICE ASR light comes on. Then the car begins to idle just over 1,000 RPMS and the RPMS start to jump when driving the car over bumps in the road. The dealership has replaced a sensor here and there. Now they are trying to tell me that the wiring harness is no good and they want to replace it for over $2,000. I’m not ready to give in to that idea yet. I’ve read several ASR problem entries on this forum and there seems to be a wide variety of solutions to fix the problem, ranging from changing the brake fluid, to cleaning the sensors on the rear wheels and even replacing the ECM. Can an ASR problem like bad brake fluid directly influence the timing of the engine in neutral? Has anyone had this EXACT problem that can give me good advice on what to do? Thanks for you help!
Team Owner
Joined: Oct 2000
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From: Fort Knox, KY
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Well, I know for a fact low brake fluid can make the ASR system act up. Have you checked the engine carefully for vacuum leaks? What about cleaning the TB and IAC motor? Basic stuff like that?
Then, I'd be leaning toward electrical issues like bad/corroded connections. And get out of that stealership and take it to a Corvette speciality shop if you can't wrench it yourself.
Then, I'd be leaning toward electrical issues like bad/corroded connections. And get out of that stealership and take it to a Corvette speciality shop if you can't wrench it yourself.
Safety Car
Joined: Dec 2002
Posts: 3,655
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From: Charleston SC
I know that my harness causes problems like yours. When I move My ECM out of the way to fill my clutch master cylinder it sometimes causes a high idle, about 1.2-1.5K and if I turn the car off and move the ECM the problem goes away. Take a close look at the wiring to the ECM and see if you can spot any problems or cracked wires. I will get to my problem and fix it one day as soon as I find the time.
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Joined: Jul 2003
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Most likely a loose connection problem somewhere from what you describe. Definitely take it somewhere where they're willing to diagnose and troubleshoot it properly. And not just spend your money throwing parts at it. I'll bet it's a cheap and simple fix once the problem's found. It probably didn't need any sensors and even less likely should require an entire harness.
