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1997 - 2006 Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator Discussion

running rough

Old May 17, 2005 | 09:10 PM
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ford390gashog
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running rough

when i come to a stop and it idles my 03 expy 5.4 will run super rough like it stumbles and is missing and shakes the whole truck what could cause this it only happens every so often it has about 25,000 on it
 
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Old May 17, 2005 | 10:51 PM
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It might be a COP problem (coil over plug). It is a bit premature at 25,000 miles, but as with any electrical device, they can go at anytime.
 
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Old May 18, 2005 | 01:01 PM
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Mine does the same. Dealer says its not out of parameters. Others in here say to look at the IAC...Idle air control.
 
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Old May 18, 2005 | 04:05 PM
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I have a 03 and it's doing the same thing. I had it checked and got the same "not out of parpmeters" from the dealer.



HC
 
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Old May 18, 2005 | 06:11 PM
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i was told it might be the IAC not working it is a common problem with these
 
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Old May 19, 2005 | 07:08 AM
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Try cleaning the throttle body plate.
 
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