1999 Saturn SL Logo
Posted on Apr 22, 2009
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99 saturn sl1 hard to start if sitting for over an hour

I have a 99 saturn sl1. I noticed that lately when the car is sitting for an hour or more, that it is sometimes hard to start. I have to give it gas and rev to 2500 RPM for a couple seconds. After this I let go of the gas it and idles pretty nice. If I have to rev the engine to start it, then usually some black carbon comes out of the exhaust, and it smokes for a few seconds. Once i let it idle for a few seconds, it stops smoking.

The plugs are good, and I change the oil regularly. I also recently cleaned the throttle body, and EGR valve. I have no codes showing on my ODBII scanner.

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  • lukecaccamo Apr 22, 2009

    wouldn't fouling plugs cause misfirign errors?

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2 Answers

hondamagnape

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  • Posted on Aug 30, 2012
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TPS or EGR could be bad.

  • hondamagnape
    hondamagnape Aug 30, 2012

    Check IACV as well.

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Jonah Oneal

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  • Saturn Master 14,092 Answers
  • Posted on Apr 22, 2009
Jonah Oneal
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You have leaking fuel injectors they are fouling out plugs.

  • Jonah Oneal Apr 22, 2009

    yes fouling plugs will cause misfire

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