rough idealing when cold
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Joined: Nov 2005
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rough idealing when cold
I have a 01 F-150 lariat with a 5.4. it ideals rough when at low RPM. i replaced the spark plugs last weekend thinking that that was the problem.
It has 81000 miles on it. it only does it at low RPM's what could be the problem?
It has 81000 miles on it. it only does it at low RPM's what could be the problem?
Last edited by IB Tim; Nov 24, 2005 at 10:59 AM.
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Joined: Jul 2003
Posts: 7,403
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From: Wheatland, Mo
IAC. (Idle air control valve). This is the most common problem with rough idling. It is located on the top/back of your intake manifold. Two bolts and one wire harness. Clean it out with carb cleaner really good, the dry it really good. If the idle smooths out, replace it. Cleaning will only help for a little while.