03-14-2017, 04:39 AM
Guy,
My '78 had a Perkins but no fuel pump switch. Low pressure (2-5 psi) fuel pumps are quite common. They are used in applications when assistance is needed to get fuel to the main pump. There was a pusher-pump that supplied fuel to the main engine. My understanding is that it was for priming only. It is possible the pump is to prime the generator for starting. (especially necessary in the event of running out of fuel or after fuel filter replacement)
I would check/change fuel filters and check the injection pump solenoid to make sure it is opening quickly. Hopefully Gordon will chime in with a more professional answer!!
My '78 had a Perkins but no fuel pump switch. Low pressure (2-5 psi) fuel pumps are quite common. They are used in applications when assistance is needed to get fuel to the main pump. There was a pusher-pump that supplied fuel to the main engine. My understanding is that it was for priming only. It is possible the pump is to prime the generator for starting. (especially necessary in the event of running out of fuel or after fuel filter replacement)
I would check/change fuel filters and check the injection pump solenoid to make sure it is opening quickly. Hopefully Gordon will chime in with a more professional answer!!
1993 Newell (316) 45' 8V92,towing an Imperial open trailer or RnR custom built enclosed trailer. FMCA#232958 '67 Airstream Overlander 27' '67GTO,'76TransAm,'52Chevy panel, 2000 Corvette "Lingenfelter"modified, '23 Grand Cherokee.