Question about 1994 Buick Regal Gran Sport

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1994 Buick Regal Custom - Overdirve quits after about 5-10 min driving

My car will run fine for about 5-10 mins, then all of a sudden the overdirve turns off. I'm running at 70 mph and 2200 rpm, then it jumps up to 3000 rpm. The overdirve will not work again until I turn the car off then start it back up. The malfunction then repeats itself. The othe thing I noticed is if I'm climbing an incline of about 3-4% at 40-45 mph the engine rpm will start ocillating like it can not decide which gear to use. I took it to a mechanic and he said something about TCC-70 or TCC-370 or something similar. Can anyone tell me a possible problem and what is that code or part? Thanks

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Sounds like it could be a Throttle Position Sensor.

Posted on Nov 25, 2008


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