Hello to All,

I have a 96 cavalier 2.2. This pass summer, i had a new engine installed due to a blown head gasket during the winter of 09. Currently, my ride is idleing very rough heavy vibration. I have a CEL light on as well. In trying to solve this rough idleing... Since having the engine installed, i have replaced spark plugs, wires, coil packs, and egr valve. Still no smooth ride. Driving on freeway, car runs smooth. Any other help or suggestions would be greatly appreciated. thanks

How long does o2 sensors last before needing replacement? Its been about 3 years since i replaced front o2 and rear o2 sensor.