Truck Forums - 01 gmc sierra

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Sikness

11-22-2011 07:08 PM

01 gmc sierra

Need help! Truck has a po300 random miss fire code. Starts fine and runs fine, when i get up to 80 kms a hour truck looses power and has a nasty chug. New plus and wires and i just replced the maf sensor, checkd o2 sensor and all is good! Clueless.... HELP!

acnas

11-23-2011 05:06 AM

Clogged fuel filter?

Sikness

11-23-2011 08:49 AM

Nope changed that too

Wiked

11-23-2011 09:17 PM

Crankshaft and camshaft position sensors. check them both.

also are your coils fine?

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