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1996 Chevy Truck Hesitation, stumble, stall

Tiny
PSBRANDON
  • MEMBER
  • 1996 CHEVROLET TRUCK
  • 6 CYL
  • 2WD
  • MANUAL
  • 168,000 MILES
I have a hesitation or stumble when I drive the truck under load. It idles fine. It only happens when I put load on the engine. It stalls when I'm backing into the driveway. I have replaced the distributer cap/rotor, plugs, wires, coil, fuel pump, fuel filter, and air filter. I've checked the ground points I can see, and tested the charging system. It all checks ok. Any ideas?
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Wednesday, September 8th, 2010 AT 9:29 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be caused by one of the following below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock 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 it.
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Wednesday, September 8th, 2010 AT 1:02 PM

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