Question about 2003 Ford Crown Victoria

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Check engine light goes on and off; lights went on and off; missing and stops on occasion when idling.

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This usually means that you should have your O2 sensors replaced or the MAF Sensor "Mass Air Flow Sensor on the air intake tube replaced. These are serious but if the car, is hesitating then it is the MAF or the intake tubes are loose letting to much air flow in the engine which this means the engine would be running too lean in bank 1or 2.

Posted on Feb 08, 2010

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Posted on Jan 02, 2017

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2010 ford fusion vibration at idle and acceleration.


Chances are its a minor miss in one of the cylinders. You don't feel it neutral at idle or until the trans goes into overdrive because those times the engine is not working very hard.
If it is a miss fire the check engine light will come on when it gets bad enough to affect fuel mileage.
If you have not yet changed the plugs I would start with that. There is also a chance you damaged the engine when it overheated.

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The car hesitates when idling or stopped at light/ stop sign, and the rpm drops to zero then goes back up.


The battery was a red herring - it would not have anything to do with the problem.
Faulty spark plugs could cause a miss but probably not make the engine stall.
What you described is a classic example of a faulty idle air control valve or a dirty throttle body. The computer controls idle speed by regulating how much air enters the intake. It opens the control valve to raise idle speed when necessary.
I would check the control valve and the throttle body.

Sep 27, 2012 | 2003 Nissan Altima

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My 2006 kia rio 5 has and intermittant engine miss. It never misses when the engine is cold, but once it warms up it will miss at idle and the check engine light will flash until the engine is reved up...


Hi, maybe it's the wires. Can you tell me if it's a random miss or specific to one particular cylinder? Do you have the trouble code? If it's random, it could be a lot of things.

Please see my tip at http://www.fixya.com/cars/r6715318-causes_gasoline_engine_misfires . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Jan 30, 2011 | 2006 Kia Rio5

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Check engine light came on the computer said misfire on number 2 and number 7. I installed new plugs and wires. The check engine light went off but it still seems to be missing and idling rough. When you...


missing at idle and good at highway speeds typically means either leaking injectors, vacuum leak and/or base engine concerns

I'd start with the injectors

May 14, 2010 | 1999 Dodge Ram

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Car idles at 2200 rpm. Slight miss at normal speed and idle. Bad MPG. Somtimes idles normally. Replaced plugs and wires. Engine light goes on and off.


Sounds like a bad vacuum leak. Check all the engine vacuum hoses, make sure none are broken/cracked/disconnected/missing.

Oct 02, 2009 | 1990 Oldsmobile Cutlass Ciera

1 Answer

3.4L engine stall at stops


do u have a check engine light coming on? if not the plugs are not the problem a miss will trigger a check engine/service engine soon light, most likely you have a dirty automatic idle speed control motor.

May 11, 2009 | 1993 Oldsmobile Cutlass Supreme

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Car stumbles,hesitates,loses power on Hwy, randomly


Did you check earth connection of electric system?

May 10, 2009 | 1995 Oldsmobile Eighty Eight

1 Answer

Rough idle and volume on the radio varies


have you given the car a tune up yet? is the check engine light on? if so, have you had that checked? that car also had a couple of recalls, have you taken it in to have the recalls repaired? I "HAD" a 2000 ford focus se 2.0L. the volume control in the factory radio has the speed control as in the faster you went the higher the volume went, so the miss in the engine might be being sent through the system and it thinks that you want to over come the roadnoise. as far as I can remember it is adjustable.

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