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2001 Blazer random misfire

Tiny
GREEN6977
  • MEMBER
  • 2001 CHEVROLET BLAZER
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 115,000 MILES
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.
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Tuesday, March 8th, 2011 AT 5:44 PM

2 Replies

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.
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.
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Tuesday, March 8th, 2011 AT 8:52 PM
Tiny
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.
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Thursday, March 24th, 2011 AT 12:09 PM

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