1997 Chevy Truck Engine misfiring

1997 CHEVROLET TRUCK
270,000 MILES • V8 • 4WD • AUTOMATIC
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JLM405
  • MEMBER
  • 1 POST
My 1997 chevy p/u k1500 with over 270000 miles started losing power and misfiring to the point where the truck was having trouble going up hills. The usual suspects were replaced ( cap,rotor,plugs, and wires) but the truck continues to misfire. Need expert advise.
Jun 25, 2010 at 4:05 PM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Possibilities: Inspect and test all the following listed below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft 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 25, 2010 at 4:06 PM
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