i have a 1999 ford ranger 4.0l 4x4 with p0171 and p0174?
Asked by bernierjustin Dec 08, 2013 at 06:20 PM about the 1999 Ford Ranger XLT Extended Cab Stepside SB
Question type: Maintenance & Repair
I have p0171 and p0174 codes, I have replaced the upstream o2 sensors, fuel filler neck, mass air flow sensor, ect temp sensor and I still have the check engine light come on! I am running out of ideas. I know the intake is not the problem I have tested that. what else could it be???
4 Answers
bernierjustin answered 11 years ago
how do you check intake gaskets? I have sprayed them with carb cleaner and the truck does not sputter?
migration_judge_roy answered 11 years ago
I'd simply REPLACE all vacuum lines with silicone rubber and be done with that forever~
migration_judge_roy answered 11 years ago
Clean the MAIN 1/0 battery cable from the cable to the chassis...wirebrush the end of the cable and wirebrush the chassis....put 'em together for a renewed system ground...the ECU does not work properly when it cannot have steady voltage and steady amperage....reset the trouble codes with a handy 20 dollar scanner~
Check your fuel filler pipe vent line. Mine was rusted away.