Question about 1997 Ford Expedition
I flunked state emissions have a check engine light on code tells me bank 1 is burning to lean 1997 expedition 5.4 v-8
It is a common problem, you will have to change bank 1, o2 sensor as it is covered in burnt oil and fuel telling the computer to run lean.
hope this help
Posted on Jan 17, 2009
Check for vacuum leaks, plugged fuel filter, and if that don't do it check fuel pressure should be 28 to 48lbs if its your fuel pressure is your fuel pump.
Posted on Mar 08, 2013
In addition of u answers check starter connection and 175 amps fuse, clean up starter and may be change the fuse
Posted on May 24, 2009
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Posted on Jan 02, 2017
SOURCE: Code #P0171 & code #P0174
The most common problem on a Ford with these codes is deteriorated PCV hoses. Check the hoses from the PCV valve to the intake manifold. Pay special attention to the rubber elbows. They often crack on the inside curve and the crack is hard to see.
Posted on May 22, 2008
SOURCE: Engine running rough at
First, make sure the gas cap is on tight(turn till it clicks) next, check for broken or disconnected
vacum lines around the top of the engine and intake manifold area. also check the vacum lines
to the purge canister and make sure there is no blockage in the lines. If the canister is bad the
charcoal filter material can get sucked into vac. lines and cause the no flow problem. Also check
the elec. connections for the purge valve(in vac.line from can. to intake manifold) and the vent
solenoid at the canister. Hope this helps.
Posted on Nov 19, 2010
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