The plenum was removed to get better access to the coolant temp sensor. The gasket was replace when the plenum was put back on the car. When the car is started it races to 3 grand and will not idle down. If the accelerator is pushed it rises to 4 grand and will stay at that spot. The fuel is running rich. The PCM is not throwing any codes. What is being over looked?

 

u created a vac leak

 

Could you give me the best ways to find the vaccum leak caused?

 

spray carb cleaner around until it is sucked into the engine and it will rev higher

 

Problem solved! Car runs and drives great!

 

and what was it?

 

Check the PCV valve there is probably a crack and its causing it to rev high