95 Olds Supreme Ides fast when cold

[scherp]

My 95 cutlass supreme (3.1) idles between 2000-2200 when the engine is cold. when the engine temp is about 150 degrees it will idle down to 1200 and stay there. I replace the air temperature sensor and that didn't help. The check engine light doesn't come on if you are driving, but will if l let engine idle.

A few weeks I had to take off the upper air intake manifold and TB to replace a o-ring on the oil pump drive shaft. Does anyone know what sensor might be causing the high idle when cold.

[maxwedge]

You need to scan it and check the code first, also make sure you connected all the sensors in the area that you worked on the engine, including vacumm connections.

[s281er238]

Replace The Tps And Aic Sensors Then Ur Set

[maxwedge]

Originally Posted by s281er238

Replace The Tps And Aic Sensors Then Ur Set

And we know this how in this situation?

[scherp]

The car is running normal again. I did change the air temp sensor, unplugged the TPS and reconnected it and made sured all the vacuum hoses were fitted correctly. Thank you all for your help.