Mechanics

JERKING OR LURKING

2004 Chevrolet Astro • 6 cylinder 2WD Automatic • 104,000 miles

I have a 2004 chevy trailblazer and when I have the airconditioning on sometimes on or off it acts like it is bucking or******** forward and backward a little. No trouble codes have come up yet.
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Rthorn78
June 6, 2011.



Could be one of the following below -check and test: Oxygen sensors.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
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.

Rasmataz
Aug 6, 2011.