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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I have 1996 Buick regal gransport and my security light on my dash came on today. What does tht mean? It has never came on before. Is it important to fix or is it minor? What can I do?


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