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2004 - 2008 Ford F150 General discussion on the 2004 - 2008 Ford F150 truck.

p0171 code

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Old Mar 3, 2012 | 08:38 AM
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Default p0171 code

2004 f150 5.4 3v. keep getting a p0171 code. surges big time under a load. Rough Idle.
I have replace the 02 sensor
maf sensor
intake manifold gaskets
fuel filter

checked the vac lines
no exhaust leaks
ran sea foam throught the gas tank

HELP PLEASE
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Old Mar 3, 2012 | 11:17 AM
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Take a look under the back end of your truck around the area of your spare tire...there's a fuel pump module mounted to the frame...what's it look like ???
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Old Mar 4, 2012 | 06:39 PM
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probably sounds weird but it looks like a tube about 12 or so inches long. couple of fuel lines out of it.
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Old Mar 4, 2012 | 07:09 PM
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"Failure mode effects management", CMP crankshaft sensor?
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