1995 Chevrolet 1500 Pickup Q&A

1995 Chevrolet 1500 Pickup Question: what is causing my truck to have a high idol when warm its at 1500. When I start

it cold the idol is about right tell it warms up and jumps to 1500. I have changed idol control valve and throttle control valve also, but now change. -
Answer 1
Vacuum leak, suspect throttle body mounting gasket. Common problem on this vehicle. -