Question about 2003 Ford Focus

2 Answers

2003 ford focus se. Car starts fine and runs fine but as soon as you take foot off gas pedal it stops running immediately.Will start back up but same thing.Will stop after lifting foot.

Posted by Anonymous on

  • Michael Grey
    Michael Grey Apr 16, 2015

    Hi Anonymous, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?You mean it will idle or only if you move the pedal to a higher RPM?

  • john rheinschmidt
    john rheinschmidt May 07, 2015

    idle bypass valve is stuck open needs replaced..

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  • Ford Master
  • 1,098 Answers

Good Evening from Cyprus. I will try to help you even from thousands of miles away. Reference you problem I believe it is the throttle Body dirty and is causing you a cut out immediately after you pull off you foot from the gas pedal. Means that the throttle due to dirt on the surrounding area of the body do not allow the throttle to close to the programmed position as a result the TPS ( Throttle Position Sensor ) does not read correct the moving - closing position as a result the air to be more reach than the fuel and cuts out. Sometimes even if you try to use a scanner to get the fault will not be much helpful. I recommend to clean the throttle body ( if you like by not stripping off ) as it is on the engine and just remove the air intake flex hose and using a ( Master Carb. cleaner and a cotton cloth,spray on the cloth and after somebody who will be in the car with ignition on having his foot on the gas pedal fully press down, you will clean slowly slowly and carefully the body with many times using the carb cleaner on the cloth and always using the clean side of the cloth. After that as your companion to pull his foot off the pedal and switch ignition off. The you try by starting the engine and see whether you do have any difference. Good Luck John.

Posted on May 07, 2015

  • Tony Avalos May 20, 2015

    Good idea, and if that don't work maybe replace the Idle Air Control Motor! Located near the Throttle housing ! This is free, and i s charging to tell you this , but you might know something i don't have the slightest idea, so we scratch each others back.

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  • Contributor
  • 1 Answer

Its ur idle bypass valve is stuck open getting to much fuel while ideling and flooding itself ..

Posted on May 07, 2015

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Electrical problem can be the most frustrating and difficult to diagnois especially when you are not phsyically at the vehicle. I will attempt to point you in the direction you should be looking. Right off the bat it sounds as if you are running low on power when the demand is high. First thing to suspect is the battery. For some reason it is low on electrical power.
Next thing is to figure out why. The first thing I would check are the cable ends. Are they corroded? It may not look as if the are, but they still could be. Clean them thouroghly.At times, when they are corroded that may be enough to stop the flow of current from the alternator to keep the battery charged up. If they look good, you may want to put your battery on a charger. Pay attention to the meter and see how much the battery is down. If it taking a lot of charge it could be it needs replacing, but charge it up and see how it works. Remember when charging a battery, first remove the caps and see if the cells are low on water. If they are your battery is probably the culprit. When a battery starts using water it's usually because some of the plates have over heated and warped, which causes them to touch each other and short out. BTW, when charging a battery make sure you remove the caps during charging. So leave them off after you check the water, AND if you need water use only distilled water. You can buy it just about anywhere, grocery store, Walmart, KMart, etc.
Check your altanator belt and make sure it is tight and not streached out. That could also be why the battery is not keeping up with the demand.
If that dosen't cure it, next take your battery in and have it tested and see if it is up to snuff. I hope this helps you and please let me know through your rating of this advice.

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Posted on Mar 23, 2009

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SOURCE: wont hold idle will start with foot depressing gas pedal will run with foot on gas but stalls when foot removed

Check and clean Idle air control valve. Make sure its responding to signal as well. Also make sure ther are no vacuum hoses disconnected. This may not be a "cure" but it's a good place to start.

Posted on Apr 14, 2009

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1 Answer

My 2005 Ford Focus won't stay running unless my foot is on the gas. It starts just fine & the check engine light is NOT on. What could be causing this?


It is likely that the engine management system has lost its base line calibration. If the battery is weak and during the crank to start the voltage dipped low enough the Engine Control Module lost its calibration. If the pedal is depressed during the crank the TPS (Throttle position sensor) will lose the idle position for the throttle. The hunting and surging and resultant stalling is the ECM seeking out the limits and re-establishing the throttle idle plate location.

If battery is OK than running the car allowing the calibration of the vehicle to reestablish itself will correct the problem. My experience is that this happens if the gas pedal is depressed during crank with a very very low battery voltage. Always the best way is to not touch the pedal during any cranking starting procedure. Or after a battery replacement.

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