Incredibly Rough Idle
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Joined: May 2008
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Incredibly Rough Idle
My 2005 Ford F150 has 93,000 miles. My check engine light came on and reports "number 3 cylinder misfire detected." Found broken spark plugs in #3 & #8. Replaced the plugs. Still idles so rough I think the engine is falling apart. Give it some gas and it screams right along. Error code still reads "number 3 cylinder....." Plenty of compression, plenty of spark, plenty of fuel, valves are good....Any ideas?
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Joined: Feb 2000
Posts: 11,496
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From: Kansas
Welcome! 
Try posting your question here: 2004 - 2008 F150 - Ford Truck Enthusiasts Forums You have a number of things it could be including the IAC valve. Let the folks in the 04-08 forum know what's going on and they'll fix you up.
Try posting your question here: 2004 - 2008 F150 - Ford Truck Enthusiasts Forums You have a number of things it could be including the IAC valve. Let the folks in the 04-08 forum know what's going on and they'll fix you up.
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earnhardtracer38
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Nov 6, 2009 05:16 PM
