Question about 2000 Mercury Cougar

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Recently while driving my 2000 mercury cougar either revs way too high(4,000-6,000 rmps) and delivers very little if any power, or it runs around 2000-2500 but back fires. Now it is turning over but not starting even with a jump. It's not the alternator or the battery- both have been replaced in the last year. I tried fuel injection fluid as well. Could it be the spark plugs? Please help!!!

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This sounds like vacuum related issues. One of the vacuum hose is off or broken. Also check the fuel filter and pump.

Posted on Feb 24, 2011

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