Question about 2003 Mercury Mountaineer

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Why does my '02 mountaineer keep dying on me?

I have a 2002 MERCURY MOUNTAINEER and this problem started a couple of months ago...it would occasionally die on me while i was idling [like at a stop sign/light] now it is is dying all the time, even while in park!! you can hear when it's about to die...the car kinda revs up, boggs down and it shutters???? it will start right back up and it does fine on the highway. also, now whenever i have to stop, i put one foot on the break and i feed it gas with the other so it won't die on me! the check engine light does NOT come on until it dies and i had it hooked up to a portable diagnostic and it didn't throw out any codes! can someone PLEASE tell me what might be wrong with my car??

thank you so much, Cristy

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  • Cristy Cunningham Jan 02, 2009

    thank you so much "lebones337" my brother works at a quick lube shop and he changed my fuel filter already, but now i will tell him what you have suggested and maybe we can get it fixed! thanx so much again! i will post when we get it solved (-:

  • Cristy Cunningham Jan 02, 2009

    thank you "motor1258"...i will look into that as well! this is a great start to finding out what is wrong with my car...i really appreciate you & others taking the time to help me!!

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I'd be looking at the idle air control valve on side of throttle body. It regulates idle under load conditions such as when turning, AC on, heater etc, brakes applied etc, & steps idle up to maintain proper idle.When this goes faulty it lots of times doesn't send a code. You may get away with just pulling it off and cleaning plunger & port it comes out of with throttle body spray cleaner,It's worth a try before you replace.

Posted on Jan 02, 2009

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I had the same problem with a kia and a dodge truck. first and most likley(this happend on the kia), turn vehicle on and open the hood. check for a load sucking or whisiling sound that would indicate a vacume leak(engine getting to much air) find the leak/tape it or replace the hose. 2nd-(also happend on the kia) the engine might not be getting enough gas. take it to a fastlube shop and have them replace the fuel filter and do a fuel sysytem cleaning. about $150. fuel filter can be done at the house if you know how but the cleaning which it the most out of the 150 has to be done at a shop. this should fix the problem, if not though(this happend on the dodge) sometimes when your vehicle is coming to a stop your tranmission doesent let the auto transmission switch down gears fast enough and make the vehicle stall(this would not happen when vehicle is idling) it that case the transmission fluid and filter needs to be replaced. about $150 at you dealer or other. hope this helps comment back with ant other questions

Posted on Jan 02, 2009

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