Having misfires, engine idles rough. Checked the spark plugs, injectors and coil packs and they are all good, is it the idle air control?

2009 subaru Impreza WRX

3 Answers

  • 6 months ago
    Favorite Answer

    You should have started with replacing the spark plugs and wires.

    What's the fuel pressure/

    if this started after filling your gas tank take a gas sample in glass jar and let it sit for a half hour to see if water separates from the gasoline.

    If all that gets done check the timing marks to make sure the timing belt didn't jump time.

    Source(s): Mitsubishi Master Tech
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  • Ron
    Lv 7
    6 months ago

    You don't have all of that without the check engine light flashing. You checked the plugs and coils meaning you ran diagnostic tests on them

    • Jared6 months agoReport

      My bad, the check engine light is on, i got it read and there are 3 cylinders misfiring, but I'm guessing its jumping from cylinder to cylinder

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  • .
    Lv 7
    6 months ago

    Get a code reading at an auto parts store. Modern cars have numerous sensors that (when bad) can cause that problem.

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