Ford Mustang Forums banner

p0171

  1. GT & SOHC
    07 GT with Airraid CAI, under-drive pulleys, short headers, stock h-pipe, Bama performance tune, new valve cover gaskets, new timing cover & gaskets, performance coil packs, straight pipe exhaust, Ford racing intake manifold. The car has been smoked tested many times, hence replacing gaskets and...
  2. GT & SOHC
    I have a 2000 Mustang GT with the roots style supercharger. I've had no problems with it and it has just turned over 60,000 original miles. But just as I've moved to Los Angeles it started throwing P0171 and P0174 codes (too lean). I need to get this car registered in CA which requires the smog...
Top