Possible fault cause | Remedy |
Fuel pressure is below normal |
Clogged fuel filter | Replace the fuel filter |
Fuel leaking from the drain circuit due to leakage install the fuel pressure regulator | Replace the fuel pump |
Fuel pressure above normal |
Jamming of the fuel pressure regulator | Replace the fuel pump |
Clogged or clamping of the drain hose or fuel | Replace the hose or fuel |
After stopping the engine oil pressure drops slowly |
Leaking fuel through nozzles | Replace the nozzle |
The fuel pressure falls immediately after stopping the engine |
Wedging fuel pump check valve in the open position | Replace the fuel pump |