Question about 2003 Ford Focus

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Car loses power while driving and jerks while it's trying to accelerate but cannot,as I press pedall to the floor.Completely slows to a crawl on the freeway and almost stops but engine does not die.Then suddenly gets burst of power for short moment then sputters out and resumes slowing.This happens consistently on traveling forward.Sounds like sputtering.Have taken to a mechanic who replaced many components.Even some so called computer or electronic parts on a this 1984 volvo dl.Im sure he also checked fuel line and other aspects to do with fuel flow.It's some very cryptic,arkane problem he was not able to remedy.Maybe you know of common secret problems wich may be the culprit.Thank you. with my ford focus it only happens once in a while and the car loses power for like 4 seconds. it also happens when i am driving slow(if i am driving below 20/mph it turnes off but then it starts w/out a problem

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  • 0417 Feb 05, 2009

    I have been experiencing the same problem but I know why it is doing that. My husband was reading the manual trying to figure out what was wrong with the car when he came across the reason why.

    Simple, When you put gas in your car you forgot to tighten up the gas cap completely.

    If your check the engine light came on then that is definitly what happened. In the owners guide they tell you how to reset it so it will run good again.

    Hope this helped.

  • Anonymous Mar 22, 2014

    truck loses power or stalls when i slow down and stop

  • Susan Renee
    Susan Renee Apr 14, 2015

    I'm having kinda the same problem with my 2001 Mitsubishi Montero Sport

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I know this thread is old, but I am having the exact same issue. It started only stalling out if I brake hard before the car warms up, has progressed to the point that I have to press the gas when starting up to keep from dying out. It will often die out in the first 10 minutes of city driving. When on the highway, it will suddenly feel thick (the acceleration), and I'll lose power. I usually back off just a bit from the gas, and it will power back up, then I accelerate more slowly to reach that speed. will stutter sometimes, feels like when it's right at that switching point, maybe a gear? The power is there, but very tempermental. What can I look at to fix this, as my mechanic wants to keep charging me $200 or more each time he tries something - I can't keep financing his training :(! Car is 2001 jeep grand cherokee limited 4.7l 8cyl w just over 200k. Thanks for any advice!

Posted on Oct 17, 2015

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Look at the back of the engine, there is a vacuum line goes into a rubber 90 degree part. Heat cause the 90 degree rubber part to have a hole in it. It is at middle of engine to the back by fire wall. Look for it when engine is cold

Posted on Apr 14, 2015

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While driving my car about 15 minutes on highway, when I start to slow down it shuts down the car. I restart the car but its hard to get my speed up again. Saturn 1993 SL 1 5 speed

Posted on Apr 28, 2013

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If you don't have a gas cap on the car or if it is on too loosely then that is a possibility. Only other thing I could think of would be water in your fuel. You may try a bottle of "heat" (I think that is how you spell it) at your local auto parts store and chunk it in the gas can. if there were any problems with water that should be the cure.

Michael

Posted on Feb 09, 2009

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SOURCE: car loses power while driving and jerks.

The mass air flow can cause these symptoms

Posted on Dec 27, 2008

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