Question about 1999 Chevrolet C2500

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1999 chevy suburban misfire

I have 1999 chevy suburban it has a misfire on cylinder #1 what cause this problem i replaced plugs,wires,cap,rotor,checked ignition system but still has problem

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  • bigdaddyvern Mar 07, 2009

    i had the suburban checked out had the injectors test everything is fine with them changed plugs wires cap rotor fuel filter had all the componets like egr valve tested and tps,map, mass aaf and all others the all checked out fine had fuel pressure checked that was good had ignition system checked everything fine there still having problem the motor only has 14,000 miles on since it has been completely rebuilt

  • Anonymous May 11, 2009

    got a new fuel pump and filter, tune up not 3 months old, still misfiring

  • sbgfield May 12, 2009

    1999 K1500 - Just put in a brand new HT383 - throwing code P0307 - misfire on #7 cylinder. Checked plug gap, wire, fuel pressure, new cap and rotor, fuel filter. Checked for vacume leaks all over. Seems to get intermitant ck engin light at higer RPM.

  • GaryZZ May 24, 2009

    1999 Chevrolet C2500, misfire on 3rd and 5th cylinder, I first changed the PCM, and then all spark plugs, all rotor and wire, does not work, then use Cargo to seal possible leak, still does not work. any suggestion?

  • mike loshbough
    mike loshbough May 11, 2010

    clean the injectors the shop you went to must be morons

  • mike loshbough
    mike loshbough May 11, 2010

    have the injectors cleaned!!

  • Dennis Boxerman May 11, 2010

    can you be alittle more specific? Is it acting like the cylinder is not firing, like a miss? Or is it backfiring thru the exhaust or induction system? A compression check could answer several questions too. Also go ahead and check out the injector even though it may be alittle strange for just one to give you trouble..

  • yadayada
    yadayada May 11, 2010

    have u tested the fuel injector? if it is ok run a compression test.



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Could be one of several things
1) run a compression check, if it low on that cyl then you have a blown head gasket or burnt valve
2) could be the enjector

Posted on Feb 27, 2009


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