F150 FUEL SYSTEM

1996 Ford F-150

Tiny

frommie25

May, 28, 2009 AT 10:56 AM

Engine Performance problem
1996 Ford F150 V8 Four Wheel Drive Automatic 142000 miles

my check engine light is lit, did a diagnostic, codes were
P0171 P0174: Fuel trim system lean, banks 1 & 2.
What can I check for fixes?

FOUND 16892 RELATED QUESTIONS

1 Answer

Tiny

Docfixit

May, 28, 2009 AT 12:53 PM

Hi
Possible causes Fuel system malfunctio ie. Injector leaking
EGR operation
Air intake or vacuum leak
Oil level too high
Excessive internal engine wear
IF all checks good disconnect fuel vapor hose from intake plug at intake. Run at 2K rpm for one minute what codes where set
Let me know
Thanks for donate

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