Mechanics

F150 FUEL SYSTEM

1996 Ford F-150

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?
Avatar
Frommie25
May 28, 2009.



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

Docfixit
May 28, 2009.