Having some issues with a high idle on my 1991 Buick Lesabre Custom. It has the 3.8 V6. we have replaced the TPS, Idle air control valve, and the camshaft sensor. The car has been to two different auto shops and they can not figure out what is wrong with it. The Tps was adjusted and the idle control valve is functioning properly. Still after the tps being adjusted it still has a very high idle. mechanics said they did find a small intake manifold gasket leak... but they said that might not cause the high idle. Please if anyone can help. we do not want to keep taking to auto shops for them to tell us they can not fix the problem, we are running out of time and money on this car. This is only has 100,000 miles on it.

 

Hi good luck man and thanks for sharing this post with us.