1994 Chevy Camaro backfire

1994 CHEVROLET CAMARO

75,000 MILES • V8 • 2WD • MANUAL

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Ok I had my car scanned for codes and a MAF problem came up. So they shop replaced the MAF sensor and now the car doesn't fall flat on its face. With that being said I still have a backfire. It is really bad on a cold start, but as the car warms there is less of a backfire. There is no pattern to tell when it will backfire. Plugs and wires are less than a year old, i have a brand new coil in as well. The injectors and oxygen sensors are still original. I also have replaced the fuel filter about 1 year ago. I also have rough idle and sometimes when I drive the RPM gauge will jump around

Jun 26, 2010 at 4:00 PM

RASMATAZ

CAR REPAIR CONTRIBUTOR
75,992 POSTS

Inspect and test all the following listed below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator,fuel filter or weak fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard.

Jun 27, 2010 at 3:46 AM

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