Question about 2000 Mercury Cougar

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2000 mercury cougar engine speed stays up when gas pedal is released, sometimes increases when pedal is releases to shif up gears, takes 3 seconds or more to come down to idle when gas pedal is released, will hold at 2000 +- 250 rpm when driving and releasing gas pedal and just letting it go onj by itself, but will drop in rpm if brake is used and gas pedal is released to slow down, and sometimes at a stop light will almost stall dropping to 250 rpm then recovering to a good idle speed of 750 rpm. The idle control motor was changed less than 10,000 miles ago (New Ford part used).

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  • 8 Answers

Almost sounds like the cruise control is engaging

Posted on Dec 04, 2012


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Posted on Jan 02, 2017



  • 2 Answers

SOURCE: 98 Mercury Tracer idle drops at a dead stop and

Check your PCV valve tube (to the right side of the top of the engine. When mine did this, the tubing for the PCV valve had dry rotted and cracked, thus losing pressure and stalled the car. Ford parts department has these at any dealership if that is the problem.

Posted on Jun 20, 2009


  • 2 Answers

SOURCE: engine stalls after cold start-up & release from high speed idle

I had a similar problem.  I found the filter cartridge below the pcv valve had carboned up, and after the crank case pressurized, oil was forced out the pcv supply line to the throttle body.  The idle air control valve solenoid got oil in it and caused my problem, but only when it was cold.  The pcv cartridge is accessed by removing the pcv valve and the rubber fitting that the pcv valve mounts in.  It can then be fished out with a pick set, and it is a pain because you can't see it, but you can get you hand back there.  I hope this helps you.

Posted on Feb 28, 2009


  • 1 Answer

SOURCE: 95 Mercury cougar won't get up to speed from the take off

shifts first to second hard

Posted on Apr 18, 2009



  • 434 Answers

SOURCE: stalls when idling

This generally is your throttle position sensor or Idle speed control motor. The idle is controlled by the Power Conotrol Module/computer & shouldn't really require adjustment at the throttle body if the components are installed & working properly.

The symptom you are describing is a textbook example of a failure in one of the parts listed above.

As always, I suggest you do check your air filter & fuel filter if not changed recently, use an OBD II tester to provide you with any engine codes that haven't yet triggered the "check engine" light. Some single codes don't trigger the light & some do, just a good check you can usually have done at a local auto parts store. Free as a rule from some of them. They want to sell you the parts! Good luck.

Posted on Feb 07, 2010

Mike Mangum

  • 73 Answers

SOURCE: Engine Stalls

for the oil pressure guage issue you need to change the oil pressure sending unit.

Posted on Apr 11, 2010

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