Question about 2003 Mercury Sable

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Stalls when idling

My 2003 Mercury Sable stalls when idling at stop lights. Do I need to increase the idling RPM? If so, how do I do that?

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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

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No you need to make sure you do not have a bad vaccum line or a bad EGR-valve give these websites a try www.alldatadiy.com and www.autozone.com if all fails stop by your local library and get your hands on a Haynes auto repair manual for your car wish you the best of luck Michigan Man.

Posted on Feb 07, 2010

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My 1997 Mercury Sable stalls at stop lights


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It is easy to check. It is in the front of the engine on the fuel rail. Pop off the vacuum line and see if there is gasoline present. If so, this means that the diaphram is bad and the regulator needs replacing. It worked for both my stalling, and hard to start when hot problems.

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When the a/c is running, when you stop at an interesection the car stalls


That's usually caused be a low idle speed.
But the processor should increase the idle speed when the A/C is on.

Check the normal ,warmed up idle speed, then step on the brake pedal to see how much the idle drops with the stop light load. Then turn on the A/C to see how much the idle drops.

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I have a 2002 mercury sable it will stall out unless I put it in neutral and give it gas when stopped at a light or slowing below 1000 rpm. What could be the problem?


Idle air control could be stuck. If so clean it with some carb and choke cleaner. EGR could be stuck partly open. If so clean that or replace it.

Feb 15, 2011 | 2002 Mercury Sable

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Service light has come on. Engine idles at 3000 RPM at one time then at 500 RPM at another. When at 500 RPM sounds like it is missing and sometimes stalls.


Idle control sensor on thr trottlebody or if eequipped; airflow meter ...off the top of my head, hope it helps.

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2001 Mercury sable bad idle


CHECK THE PCV VALVE HOSE THAT CONNECTS AT THE BOTTOM OF THE THROTTLE BODY, THESE HOSES ARE KNOWN TO DETERIORATE AND ALLOW UNMETERED AIR TO ENTER THE COMBUSTION CHAMBER, WHEN THIS OCCURS THE OXYGEN SENSOR'S SIGNAL TELL THE PCM TO INCREASE THE PULSE WIDTH OF THE INJECTORS CAUSING THE VEHICLE TO ALMOST STALL.

Feb 26, 2009 | 2001 Mercury Sable

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