Question about 2001 Hyundai Elantra

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I have a 2001 Elantra GLS that keeps misfiring. I had it to the service and they did a tune up with plug assy, cable set and coil assy. It ran good for a few weeks, but now it's the same problem. Low idle is rough and misfires, check engine light is on again. What else could cause this? It runs smooth when foot is on gas and I am moving, it is when I stop that it rough idles. It seems to be worse when the engine is warm, and in warmer weather.

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  • Dan
    Dan May 30, 2010

    What is the check engine light code?

  • judseasandi May 30, 2010

    Check engine light, by the owner's book, says a sensor is not being satisfied. Note that I had the flexpipe replaced as the old one was cracked. The engine seems to be worse when it is warm, especially on warm days. Sometimes it runs a bit smoother, then it gets rough.

  • Dan
    Dan May 30, 2010

    You need to find the check engine light code, it is going to be the letter P followed by four numbers. The monkeys at the repair shop couldn't fix it right the first time and don't start swapping parts like the idle air control valve because its just going to give you frustration and cost money. Some places like Autozone and Pepboys can pull the codes for free. Find the code number and then we can start from there.

  • judseasandi May 30, 2010

    I will check out a pep boys I believe is close to here. thanks, and I'll get back to you. Maybe they will even have the correct fix as well.

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Check Idle speed motor

Posted on May 30, 2010

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