2001 blazer random misfire

2001 CHEVROLET BLAZER
115,000 MILES • 4 CYL • 4WD • AUTOMATIC
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GREEN6977
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  • 25 POSTS
when motor is cold the truck runs fine. but once it gets warm it starts to miss really bad and seems like it loses power. i changed plugs and wires and fuel filter. it starts missing around 1200 rpms. if you give it gas it****** really hard and acts like it don;t want to shift but when it does shift it shifts fine. also here clicking on the top of the motor more towards to passenger side.
Mar 8, 2011 at 5:44 PM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 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.
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 and keep testing.
Mar 8, 2011 at 8:52 PM
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GREEN6977
  • MEMBER
  • 25 POSTS
it was the distrubutor. i changed the cap and rotor. turned it on and it was a grinding sound. when we replaced it tho we lost the timing any tips on how to get it back where it needs to be.
Mar 24, 2011 at 12:09 PM
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