RANDOM MISFIRE

2001 Chevrolet Blazer

Tiny

green6977

March, 8, 2011 AT 5:44 PM

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.

2 Answers

Tiny

rasmataz

March, 8, 2011 AT 8:52 PM

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.

Tiny

green6977

March, 24, 2011 AT 12:09 PM

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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