Fuel Pressure Regulator (FPR) Valves

Fuel Pressure Regulator (FPR) Valves control the pressure of fuel supplied to the fuel injectors. 

The following symptoms could indicate a faulty FPR valve

(Faults should always be diagnosed professionally)

  • Black spark plugs
  • Engine not running smoothly
  • Black smoke from the exhaust
  • Dipstick smells of fuel
  • Fuel dripping from the exhaust
  • Engine stalls
  • Fuel in the vacuum hose pipe