Question about 2005 Chevrolet Colorado

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I'm having problems with my 05' Colorado. The alternator And battery were bad so I replaced them. I changed the fuel filter and plugs. Coils were fine. Once u start it the idle is really bad and shuts off. What could be the problem?

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  • Chevrolet Master
  • 6,826 Answers

Are there any codes in the computer that might lead to a solution? Is there a service engine soon light going on associated with the bad engine idle and shutoff?

Posted on Oct 02, 2010

  • 3 more comments 
  • glowinstar_1 Oct 02, 2010

    no engine light on at all. I even cleaned the mass air flow sensor and throttle body.

  • Duane Wong
    Duane Wong Oct 02, 2010

    I would check for gas and spark. If there are fuel injectors for each cylinder, I would get a fuel injector tester to see if they are all getting voltage as indicated by a blinking light on the fuel injector tester. Then, I would check for spark in each cylinder.

    Hopefully, the computer is not bad at this point, but if it is, then it can cause certain cylinders to not fire, either due to spark or fuel problems.

  • Duane Wong
    Duane Wong Oct 02, 2010

    If there is no engine light on at all, especially after turning the ignition on and before starting it, then that can indicate a problem as well. The service engine soon light should light before starting it.

  • glowinstar_1 Oct 02, 2010

    thanks

  • Duane Wong
    Duane Wong Oct 02, 2010

    You're welcome, I hope you can fix this problem.

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