Question about 2000 Mercury Cougar

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Engine starts and rpm revs to 3000 - you take foot off of gas and rpm drops to 100 and the dies

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Any smoke coming out the tail pipe? is it black, carbon smoke? if so your catalatic converter is clogged. replace it.

Posted on Dec 10, 2010

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Rpm does not drop below 1000


No,only on carburated engines it,idles down to the set point,on yours,it's fuel injected,pushing gas pedal won't kick idle down,should go down after a certain amount of time,does it automatically,If you start and drive a 5 mile ride and stop at a stop sign,it should idle at it's set point if there's no engine problems,which may be.5 to .7 on your tac.When you normally first start,it will idle between 1000 to 1200 rpm's,don't push on gas,let idle say 15 seconds,put in drive and go.

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When starting, engine will rev up to 3000 rpm then will die. but you can keep it running if you keep it revved up above 3000 rpm


Things to look for: Could be your intake manifold gasket, throttle position sensor, vacuum hoses, throttle body gasket, idle screw, fuel pump, fuel filter, fuel pressure regulator, or maybe you have a split in your gas tank or fuel line(s) that is messing with your fuel pressure. See if you smell gas back near the driver's side rear wheel.

Good luck, those are things I would search for, I can't promise anything, could be a number of things. You should have a check engine light on.

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You need to check the cable the runs from the gas pedal to the engine, it might be rusty and need some drops of penetrating oil at the point it meets with the engine accelerator valve.

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sit with foot on gas at steady 3000 rpm, then turn on all your lights, hazard warning lights, heater, and window defrost, if the power drops , then you need a new battery....sometimes the battery power can control the engine idle, the alternator is only for charging the battery, not for running the cars electrics, this is the battery's job

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Check for a vaccum leak at the intake with starting fluid. Frankster016

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