Question about Ford F-150
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Posted on Jan 02, 2017
what codes are present? If it is lean codes P0171/P0174 problem is most likely the orings leaking between upper and lower intake manifold if this is a 4.0L
Posted on Feb 11, 2009
hi, i would get the oxygen sensor looked at first as this only starts working when the exhaust reaches a certain temp.
But as your getting the problems when the engine is up to temp then this is what i would look at first it also called a lambda sensor.
Their is no way of testing this yourself but a garage could run a test and tell you if that part is at fault.
The problem is you just need to iliminate things orderly so i would get the oxygen sensor checked first before you spend money on other parts. If this is at fault then its not expensive to replace and does cause the problem your having
Posted on Aug 23, 2009
SOURCE: Ford 150 runs rough when cold
Hi! Either the elbow at back of intake manifold is leaking or your intake gaskets are leaking. A very common occurance on both items and either one will set a lean code and illuminate the check engine light. Hope this info helps!
Posted on Sep 17, 2009
SOURCE: rough idle when cold and hot
have you replaced coil pack? Check EGR passage through upper mainfold and make sure clean. also make sure EGR valve not stuck part way open. Also check crank and cam sensors along with MAF.
Posted on Oct 19, 2009
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