Here is what I would do. You take it anyway you want.
I would find the code so I could determine which of the O2 sensors is bad.
Replace the sensor and test. If no problems, great. If the problems persist then:
Check the coolant level
Take off the Idle Air Control valve (IAC) and clean it very well. It has coolant that flows through it and air.
Purge the cooling system of any air. Air in the coolant will give a misreading to the computer.
Check for leaks in the vac lines.
Thursday, June 14th, 2007 AT 7:45 AM