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Thread: 2003 2.2L Sunfire Rough Idles at Stop Lights

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    Array bsr2002's Avatar
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    Question 2003 2.2L Sunfire Rough Idles at Stop Lights

    Throttle body cleaned, replaced IAC, MAP sensor, Fuel filter, Air Filter, Fuel pressure regulator.

    When I check fuel pressure I get 50psi.

    Spark plugs were changed.

    No vacuum leaks.

    I'm at a loss....

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    Check the throttle body, pop off your injectors give those a peek, coilpack for misfire.

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    Often caused by the evaporative emissions purge valve sticking. Cheap replacement part.

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