Question about 2003 Ford Focus

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Cold start up

First starting the car every thing is fine for about thirty seconds,then idle drops,engine light goes on,stalls,start again same thing again ,then to compensate add alittle throttle,it also dies until you hold it to 17oo rpm till it warms up,not to sure to look?

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Have air mass flow sensor check can be faulty, get one form ebay or junk yard if need to replace them, its pretty expensive new.

Posted on Sep 20, 2009

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You have to check the computer for fault codes; the problem is likely caused by a faulty sensor. Take the car to autozone, they'll check the codes for free

Posted on Sep 20, 2009

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1 Answer

How do I fix my BMW X3 2004 it has trouble starting on cold starts in winter and it stalls? Any solutions? More details below.


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I need to get a clear mental picture of what exactly is happening.

With this said, you stated that the car "runs fine" until warmed up.

Q: When you start the car when cold it idles fine?
Q: If you allow the car to idle until "fully" warmed does the car stall?
Q: As the car begins to warm up, Does the RPM fluctuate abnormally?
Q: Does the car Only stall when you press on the gas pedal or does it stall just sitting and idling in addition to pressing the gas pedal?
Q: If you can drive it while cold does the car stall during acceleration when warm or only at Stop Signs / Lights?
Q: If you wait 20min or so, can you start the car again?
Q: How many miles are on the car?

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