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02 Sonoma MAF

Discussion in 'General Chevy & GM Tech Questions' started by BLOWOUT, Dec 4, 2012.

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  1. BLOWOUT

    BLOWOUT New Member

    I have a 02 Sonoma 4.3l, and its throwing the dreaded p0300 code :/ I have rebuilt the motor and replaced all the ignition components and its still giving the p0300. It threw the MAF code 1 time, I cleaned it and cleared the code and it never came back. But I'm wondering if it may be faulty but not throwing a code ? The only thing that puzzles me is, when i watch it with an OBD II its cylinders 1 & 4 that misfire and every once in a while another cylinder will mis once or twice? any ideas or imputs ? thanks!!
     
  2. kinson33

    kinson33 Member 1 Year 100 Posts

    Misfires on warm up or still misfires after the engine is running at operating temp?
     
  3. Jamm3r

    Jamm3r Member 1 Year 100 Posts

    What do the fuel trims look like?
     

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