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Old 01-13-2004, 02:45   #1 (permalink)
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rough ideling XF HELP

Hey guys im having a few problems with me XF Ghia. All off sudden after leaving work yesterday it decided that it didnt want to idel under 1900 RPM. Its as if the accellerator is getting stuck on. Im getting a new cable as there is a little fraying but even when you pop the bonnet and play with the accellerator itself it is fullt releasing but still ideling so high .Does anyone have any ideas as to what my problem may be. I havn't had a timeing light over it for a while so does anyone think that that may be my problem
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Old 01-13-2004, 05:09   #2 (permalink)
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Re: rough ideling XF HELP

Check your Air Flow meter. Ford used a Vane Type Air Flow Meter on the XF which has a flap inside which movies according to the engine vaccum telling the computer how much air is comming into the motor... Sometimes the Meter get stuck cousing high or rough idle....etc.
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Old 01-14-2004, 03:05   #3 (permalink)
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Re: rough ideling XF HELP

i had a look at air flow meter yesterday and it is open about about 5-10 mm. Is this suppose to be like this or is it supposed to close all the way when the car is stopped
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Old 01-16-2004, 08:58   #4 (permalink)
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Re: rough ideling XF HELP

Should be closed all the way when the engine is off...

Can you push the flap closed, or is it stuck?
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Old 01-16-2004, 18:30   #5 (permalink)
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Re: rough ideling XF HELP

i can push it shut so its not stuck but i decided to pul it appart the other day and when i put it back on it seems to be ideling better so im not sure what the problem was
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Old 01-16-2004, 20:56   #6 (permalink)
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Re: rough ideling XF HELP

Is your XF on gas... If so, it may have backfired at some stage on starting.

There is a spring in ontop of the airflow meter that is set at a specific tension. Backfiring usually wrecks the spring and it doesnt shut the flap properly...

This can also happen as the thing ages as well.. I know there are a few places that can retension them correctly. This might be a place to start.
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Old 01-20-2004, 07:07   #7 (permalink)
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Re: rough ideling XF HELP

I had the same prob with my XF. i.e. all of the the sudden it started idling like shit. I checked and tried everything I could think of. In the end, when
I was about to give up and pull the head off suspecting a valve prob I took the rocker cover off and watched the motor idle. I noticed that one pushrod didn't seem to be doing much to push the valve. It turned out that i had a "Mushroomed" lifter. I went to my local wrecker and paid $5.00 for a new lifter and replaced it. Problem fixed. Apparently this is a pretty common fault. Worth a try I guess.
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