Re: E85 and codes PO171 and PO174
I know you had it checked for leaks but check to rubbed elbows on the PCV line. They have a record of cracking and causing those codes. Replace entire line with heater hose.
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(SOLD) 2003 Ranger 4.0L V6 FX4
2001 F150 Supercrew Triton V8 (DD)
2008 Fusion 3.0L SEL V6 (my baby)
1992 Taurus SHO MTX (my toy-almost Supercharged)
2004 Nissan Murano SL AWD (Wife's car)
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