Mechanics

RANDOM MISFIRE

2001 Chevrolet Blazer • 4 cylinder 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.
Avatar
Green6977
March 8, 2011.




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
Rasmataz
Mar 8, 2011.
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.
AD

Tiny
Green6977
Mar 24, 2011.

AD