1993 GMC YUKON 5.7

1993 GMC YUKON
95,678 MILES • V8 • 4WD • AUTOMATIC
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JAYMAN768
  • MEMBER
  • 3 POSTS
RUNS FINE FOR 20 MIN.THEN STARTS TO RUN ROUGH & STALLS WHEN YOU TRY TO RESTART MOTOR SHAKES LIKE THE TIMING IS OFF (KICKS BACK) CHANGED DISTRIBITOR (USED)& CLEANED OUT THE CATALITIC CONVERTOR AFTER 2-3 HR RUNS OK AGAIN ALSO WHEN AT FULL THROTLE RUNS FAST & SLOW LIKE A REV LIMITOR ?
Mar 14, 2011 at 3:52 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Do you have a check engine light?

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.
Mar 14, 2011 at 4:03 PM
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