Question about 2006 Ford Fusion

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Low rpm on start up, check engine light came on.

When i start the car the RPM drops from 1000 to 600 RPMs, then up to 1500 RPM at idle. once it warms up it idles at 1000. then check engine light came on. i cant feel any problems while im driving. i checked air filter there was a rats nest in it. cleaned it out and changed the air filter. the check engline light came back on. maybe the rest was the problem at first but i dont know why the check engine light keeps coming back on once i deleted the codes by unhooking the battery.

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  • yadayada
    yadayada May 11, 2010

    look the very 1st thing u do is find out what trouble code was stored with the check engine light coming on, in the shop this is the very 1st thing we do, and i work for a Ford dealer my job is u guessed it check engine light problems, Ford master technician in electronics.

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If you dont have a code reader go to Autozone and have them read them for you. it sounds as if you may have a defective sensor. It may be a simple cheep solution to try to clean your mass air flow sensor. You Can do this by taking some brake parts spray cleaner to clean it up. the brake parts cleaner dosent leave any residue so it wont harm the sensor. If you dont know where the sensor is located it is usually located just after the air filter box.

Posted on May 28, 2009

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