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Ford Explorer Community - Maintenance - Modifications - Performance Upgrades - Problem Solving - Off-Road - Street
Explorer Forum Covers the Explorer ST, Explorer Sport, Explorer Sport Trac, Lincoln Aviator, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Ford Aerostar
Hi my name is Ed. I have 1999 ford ranger 4.0 that keeps giving po171 & po174 I have replaced intake gasket the last time I had these codes that stopped it for a while then the fuel pump went out it has built in tank pressure regulator with a fuel rail damper returnless system I have replaced...