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Performance Upgrades - Maintenance - Modifications - Problem Solving - Off-Road - Street Trucks. Covering the Explorer, ST, Sport, Lincoln Aviator, Sport Trac, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Aerostar. Featuring H.I. - Human Intelligence.
I have a 1999 mazda b2500 with the code po 171 system too lean bank 1 I canged the fuel filter and checked fuel rail pressure it was 39 could it be the fuel pump or fuel pressure regulator or intake gaskets