tiger4life

iTrader: (16)

How likely is it that O2 sensors are bad even though the check engine light isn't triggered. I get engine vibration that I can feel throught the steering wheel.

I have replaced maf, engine and trans mounts, exhuast mounts, spark plugs and wires, valve cover gasket, had timing belt service and cleaned the throttle body.

The vibration doesn't occur until the car warms up. The idle was set properly with a scan tool when I replaced the throttle control motor. So this leads me to believe the vibration is caused by something that operates when the car enters closed loop mode. The major thing that comes online is the O2 sensor. Anyone else know something else in the closed loop system that could cause the problem? I thought maybe the fuel injector or filter but the car is smooth when it 1st starts cold.

aprince1

iTrader: (5)

Have you checked the pcv valve?
And what kind of spark plugs did you use?