Question about 2001 Ford F150 Styleside SuperCrew
Truck starts surging in cold weather before it warms up. computer shows lean bank, o2 sensors bad
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Posted on Jan 02, 2017
SOURCE: engine surges at idle in gear
It sounds like you have a intake leak or vac leak . The codes to lean are caused by air that is getting in your engine that is not being measured by the computers sensors
Posted on Mar 23, 2009
I found this on two 1999 F150 trucks with 5.4L. One was mine. There is a vacuum hose on the back passenger side of the engine that is about the size and length of your thumb. With age, this hose will collapse and then develop a vacuum leak. It can be pretty load if leaking.
Posted on Jun 22, 2010
The first thing i would do is have the computer scanned for codes the codes will help by telling you where the problem is, you may need to do some testing but the codes will point you in the right direction, the computers are always testing and watching all componets, when the computer sees a problem it will turn check engine light on and store a code with the problem it found, next thing a would check is the fuel preasure, the engine may not be getting the correct preasure and in turn no power.almost all autopart stores will scan the codes for free and if you get the codes i will help you further, hope this helps.
Posted on Dec 22, 2010
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