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Stumbling Chevy Corsica
Q.
I recently bought a 1989 Chevy Corsica, 2.8 liter, as a sort of project car to become familiar with car repair. Overall it is in very good condition, however a few days ago I went for a drive and as I was coming off a road at around 35 mph, down a hill (so my foot was off the gas), the engine started to stall.
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Once parked on the side of the road, the car started fine, however as soon as I put the car in drive, it would stall out again. In the end the only way I could get the car home (which wasn't very far) was to drive with my foot on the brake and gas at the same time (so the engine was always revving).
I did a 'DIY diagnosis' and determined that it was the TCC solenoid, but when I looked under the air intake, I noticed that it had been disconnected. So I cleaned the contacts, plugged it back in, took it for a drive, and initially it seemed to run fine. After around 15 minutes of driving, the car began to stall in the same manner as before.
However, even while cruising at 35 mph to 40 mph, the engine would repeatedly want to stall (engine light would flash, and the engine would cut out briefly ½ second), but of course never did due to the momentum, that is until I came to any traffic light or stop sign. So, my questions are:
- Is my problem the TCC solenoid?
- I read in a few cases that people just disconnect the TCC solenoid, and presto, the problem is gone. I'm assuming that is what they did in my case.
If that is true what is the true purpose of the TCC solenoid, and why did the Corsica stall with it disconnected? Thank you very much for you time and consideration. I truly appreciate having the opportunity to voice my problem.
Regards,
Tom
A. A bad TCC solenoid symptom is a violent shudder when coming to a stop. It's like stopping with a stick shift car without pushing in on the clutch first. Unplug the wire again. It should not even apply so it can't be that. My guess is a bad ECM. get it to act up and try tapping on the ECM with your hand. It's to the right of the glove box. You need to remove the glove box to get to it. If you can make it stumble while tapping on it, you need a new ECM.
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