VIPTHELIFESTYLE
Member
Boat:
Silverton 330 Sport Bridge
2002 Crusader 5.7L MPIs
Raw water cooled.
Both engines running off the same tank.
Motor in question just had heads replaced and timing done with new plugs.
Filtration from Tank to Motor.
1 Hocky puck filter
1 paper filter on high pressure fuel pump in the FCC.
Here are the symptoms:
Boat get's up on plane pretty quick (3600-4000 RPM) and runs the same exact distance (approx 1.5 miles or about 6-7 minutes) before port motor drops RPMs. When this happens it sounds like there is a huge miss in the motor sounds like it's about to shut down. If you bring the throttle down to 2400rpm it will run forever. Once at 2400 RPM for a few seconds, it will go back up to 3600 RPM for a few seconds. The longer you keep it at 2400 RPM the longer you can do 3600 RPM. No alarms go off when the RPM's drop. During all this the starboard motor is a champ, always ready to party so fuel in the tank isn't an issue. Tank vent isn't an issue. When I swap parts, the starboard side is always fine. Port always has the issue.
This is what I've done so far:
Swapped anti-siphon pickups from the tank - no fix.
Swapped pressure regulators on motors - no fix.
Emptied water from Fuel Control Cell and changed filter - no fix
Cleaned Hocky Puck filter (mesh screen) - no fix
Swapped low and high pressure fuel pumps - no fix
inspected all lines between puck filter all the way to the rail - no issue, no fix
disconnected oil pressure sender switch - no fix.
I know... put it on the computer or pressure guage on the fuel lines. But short of that, anyone else face this problem? Anything else you would try?
Is a knock sensor triggering timing adjustment? If so would it run fine for a while?
Map Sensor? How do I test this?
Any help would be appreciated. Let the brilliance begin!
Thank you in advance for your help.
Silverton 330 Sport Bridge
2002 Crusader 5.7L MPIs
Raw water cooled.
Both engines running off the same tank.
Motor in question just had heads replaced and timing done with new plugs.
Filtration from Tank to Motor.
1 Hocky puck filter
1 paper filter on high pressure fuel pump in the FCC.
Here are the symptoms:
Boat get's up on plane pretty quick (3600-4000 RPM) and runs the same exact distance (approx 1.5 miles or about 6-7 minutes) before port motor drops RPMs. When this happens it sounds like there is a huge miss in the motor sounds like it's about to shut down. If you bring the throttle down to 2400rpm it will run forever. Once at 2400 RPM for a few seconds, it will go back up to 3600 RPM for a few seconds. The longer you keep it at 2400 RPM the longer you can do 3600 RPM. No alarms go off when the RPM's drop. During all this the starboard motor is a champ, always ready to party so fuel in the tank isn't an issue. Tank vent isn't an issue. When I swap parts, the starboard side is always fine. Port always has the issue.
This is what I've done so far:
Swapped anti-siphon pickups from the tank - no fix.
Swapped pressure regulators on motors - no fix.
Emptied water from Fuel Control Cell and changed filter - no fix
Cleaned Hocky Puck filter (mesh screen) - no fix
Swapped low and high pressure fuel pumps - no fix
inspected all lines between puck filter all the way to the rail - no issue, no fix
disconnected oil pressure sender switch - no fix.
I know... put it on the computer or pressure guage on the fuel lines. But short of that, anyone else face this problem? Anything else you would try?
Is a knock sensor triggering timing adjustment? If so would it run fine for a while?
Map Sensor? How do I test this?
Any help would be appreciated. Let the brilliance begin!
Thank you in advance for your help.