Have 2002 crusaders with 8.1 mpi on a 39 Silverton MY. While at cruising speed of 3600 rpm for about 5 minutes, lost power on port engine. After slowed down, put engine back up to cruising speed and lost power again on port engine with engine ultimately failing and inability to start. This season Port engine was difficult in starting and ultimately wouldn't start at all. Pancake filter was clean. Replaced low pressure fuel pump but still wouldn't start so then replaced high pressure fuel pump. Engine started right up and took it out for run. Was running fine but only getting 3800 rpm at WOT. Replaced fuel filters in both engines and when took it out the next time experienced the problem described above with the loss of power on port engine. Checked anti siphon valve in port gas tank and had some debris in it, but did not fix problem. Mechanic then removed valve and still no fix. Replaced plugs but still same problem. Seems as if not having enough fuel pressure at high speeds which causing engine to slow down and ultimately fail. Fuel seems to be ok.
Above process has been going on for two months. Help.
Above process has been going on for two months. Help.