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what everyone said is all great advice, however, unless your new to driving cars i suspect you have already done a tune up. if so then i would check your throttle body. Mitsubishi's every so often has a few throttle bodies that seem to fall apart at the low temperature engine idle choke. it recirculates some of your exhaust to warm up your engine faster. as soon as it reaches a certain degree the spring is heated and expands turning the tiny flange closing off this exhaust circuit.
it uses a single retaining screw that if never checked may sometimes vibrate and fall out eventually. causing a rather significant air leak in your intake making your MAS read less air flow in turn making your air fuel mixture way off and causing a huge difference in fuel economy. the very same thing had happened to me and my car was getting a lousy 15 miles per gallon around town and only 19 freeway on a 2.4L 4 banger. very very very sh!tty for a 4 cylinder.
now that i have fixed this problem i get around 22 miles per gallon in town and 27 on freeway. making a huge difference in my wallet size from the 5 months i drove it with that lousy screw missing. i just thought because it had over 200,000 miles on it that the engine just sucked a$$, and was about to die.
anyways i hope that this helps you. if it doesn't oh well at least you now know something new to look out for just in case.
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Jan 11 2008, 01:09 AM
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