Jerking or Lurking

2004 CHEVROLET ASTRO
104,000 MILES • 6 CYL • 2WD • AUTOMATIC
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RTHORN78
  • MEMBER
  • 1 POST
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.
Jun 6, 2011 at 3:47 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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RASMATAZ
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 75,992 POSTS
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.
Aug 6, 2011 at 1:58 AM
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