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Runs like crap...sometimes.

Discussion in 'The Injection Section' started by clarkjw24, Sep 19, 2006.

  1. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    I've got a friend with a 97vortec in a silverado. Sometimes it runs fine, then sometimes the check light will come on and it will skip and studder. It will even stumble so bad that it will cut off if you slow and come to a stop. Any ideas on what this may be? Someone told him that its a sensor. I don't know, don't have a way to check it because it only does it about once a week.
     
  2. btolenti

    btolenti 1/2 ton status

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    is the ECM throwing any codes???
     
  3. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    Yeah the service light comes on but only when its messing up. Its not throwing a code the whole time.
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

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    I thought OBD2 stored any and all trouble codes whether shown by the SES light continously or not, for something like 50 engine starts WITHOUT the same failure occurring...
     
  5. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

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    Yeah, the light on my '05 Dodge will go out after 3 engine starts (I think) but the code is stored for much longer.
     
  6. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    Well you learn something new everyday. I'll check it then.
     

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