Running issues...have scanner...need help - Maintenance and Repair Forum

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Running issues...have scanner...need help
Wednesday, October 27, 2010 10:46 AM
97 Sunfire 2.2L 3spd
Car has had a ton of "maintenance" parts replaced in the last few months. Air filter, fuel filter, spark plugs, wires, coil packs, upr/lwr intake manifold gaskets, and even replaced a few leaky injector o-rings. Had the timing chain replaced about a year ago and the vehicle just hasnt seemed to run right since.

The car has a very lopey idle and it sounds to either have an exhaust leak or its firing at the wrong time. Im just not sure.

Idle is very rough, if you decel and get caught at a red light the car will die if you dont feather the gas pedal.
Acceleration on the low end is weak but over 3k RPM it will get up and go.
Some times it starts right up and sometimes u have to give a few cranks before it catches.

My STFTs are at -34 at idle. I have a Genisys scan tool and can give more data if needed. Thanks guys




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