HESITATION

1991 DODGE TRUCK
108,000 MILES • V8 • 4WD • AUTOMATIC
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ROLLAND09RAMCTD
  • MEMBER
  • 1 POST
1991 DODGE POWER RAM W 150 RUNNNING RICH, ONCE WARM ENGINE WITH STUDDER A BIT WHEN TAKING OFF FROM A STOP OR JUST TAPPING THE PEDAL A LITTLE BIT...i HAVE REPLACED O2 SENSORS, SMOG PUMP WAS LOCKED UP AND REMOVED BEFORE BUYING TRUCK...NEW PLUGS, WIRES, AND ACCEL COIL.
Jan 10, 2011 at 7:04 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 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
Jan 11, 2011 at 12:59 AM
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