1996 GMC Sonoma Hesitates

1996 GMC SONOMA
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RONVANBUREN
  • MEMBER
  • 1 POST
Engine Performance problem
1996 GMC Sonoma 6 cyl Four Wheel Drive Automatic

My 96 GMC Sonoma hesitates for the first 10 minutes after starting it while the engine is cold. Once it gets thru the warm up it starts and runs fine. Doesn't seem to have the power I think it should have either.
Jun 18, 2010 at 6:25 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 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 leaking or defective 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 18, 2010 at 9:13 AM
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