HARD STARTING 350SD

[DIESEL]

1991 350SD HARD STARTING ONLY IN MORNING IT APPEARS AS IF FUEL IS DRAINING BACK INTO THE TANK OVERNITE. IS THERE A CHECK VALVE TO PREVENT THIS OR MUST I REPLACE THE INJECTION PUMP. ANY SUGGESTIONS ARE WELCOME-THANK YOU

 

[bigt]

diesel starting

there should be non return valves in the fuel lift pump to prevent this happening. Check all unions on and around both pumps for tightness and air leakage.