DinghyCaptain
New member
been chasing this for a little bit off an on and im starting to scratch my head...
2005 Crusader Captains Choice MPFI 5.7L with the "New returnless fuel system" 330hp
the engine seems to be losing fuel delivery under load at RPMS but im not getting very far chasing down why so maybe its something else.
symptoms. engine will run all day at low rpms, idle to about 2000rpms roughly. under no load (neutral) seems to run fine as well. if you put the throttle to it in gear she starts to pick up like normal, and then drops out like the throttle was pulled back after 15-45 seconds.
i started with filters, fuel pressure at the rail is 60-75psi at idle and during the priming period before startup, the electronic pickup pump seems to be pumping fuel but i dont know at what psi and i cant find what psi its supposed to be running at (im assuming 3-7)
boat has 2 fuel tanks, switching between them makes no difference so i dont believe its a tank related problem
symptoms started all of a sudden while out with the boat, and have only gotten marginally worse over time, but roughly stayed the same... literally slowed down over a wreck to scan for fish, went to pull away and it started acting up...
my next course of action is going to be to check the psi at the pickup pump, and run a test pump and fuel line from a portable tank to the high pressure pump to try and isolate the issue...
thanks in advance
2005 Crusader Captains Choice MPFI 5.7L with the "New returnless fuel system" 330hp
the engine seems to be losing fuel delivery under load at RPMS but im not getting very far chasing down why so maybe its something else.
symptoms. engine will run all day at low rpms, idle to about 2000rpms roughly. under no load (neutral) seems to run fine as well. if you put the throttle to it in gear she starts to pick up like normal, and then drops out like the throttle was pulled back after 15-45 seconds.
i started with filters, fuel pressure at the rail is 60-75psi at idle and during the priming period before startup, the electronic pickup pump seems to be pumping fuel but i dont know at what psi and i cant find what psi its supposed to be running at (im assuming 3-7)
boat has 2 fuel tanks, switching between them makes no difference so i dont believe its a tank related problem
symptoms started all of a sudden while out with the boat, and have only gotten marginally worse over time, but roughly stayed the same... literally slowed down over a wreck to scan for fish, went to pull away and it started acting up...
my next course of action is going to be to check the psi at the pickup pump, and run a test pump and fuel line from a portable tank to the high pressure pump to try and isolate the issue...
thanks in advance
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