Ford Explorer 1997 4x4 192000

1997 FORD EXPLORER
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BASHIE1
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My explorer is still coming up wit the codes 0171 and 0174 It says the fuel is to lean on both banks. Is is possible its a vaccum leak. THe vaccum lines have been replaced as well as everything except the egr valve. Its not really running rough at all.What do you think it could be?
Feb 21, 2007 at 8:52 AM
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KIN CHAN
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type obd2 and system lean on google...u'll probably have 40-80 pages of conditions....on ford most likely mass air flow sensor..don't change it ..have a shop using a scanner and do a fuel trim evaluation then take according data value and calculate volumetric to determine the accuracy of the mass air flow sensor...or else ...any mechanic know how to use a scanner should have no problem to nail it down...good luck man
Feb 21, 2007 at 11:27 AM