Hi i Have a 1986 Oldsmobile Delta 88, 3.8L V6, vin3, port fuel injection, car. I started getting a really high idle on cold days, cold engine.
I took it to have the "Service engine soon" light codes retrieved and got a bad "TPS" and "Idle Air Control Valve" codes. Both were replaced with GP Sorensen parts and i still get the high idle and the service engine soon light still comes on. After replacing the parts i get the check engine light on almost all the time now.
What would be causing the problem? Could it be defective parts?
Myc