5.7 missing and dying
Hi everyone. I love this forum since I found it, and I wondered if I could pick your brains. I have a 2001 2100 SR with 5.7 2bbl carb, and about 80 hours on it. I'm having an apparent fuel problem. When I put my boat in and run it, it runs great for awhile. Later it starts missing, and will stall. Putting it back to idle, will keep it running sometimes, but it usually won't move much above idle without shutting off. I started trying to diagnose the problem while on the water, and found that If I take off the fuel filter (water separator/fuel filter spin on type) and empty it out and put it back on, the boat would start and run strong for about a mile or so, then again missing and shutting down. My conclusion was bad fuel from sitting. I pumped out the entire tank with a see through filter where I could watch it come out, with very little gunk in the filter. I put on a new fuel filter and 20 fresh gallons of 89 octane, with dry gas treatment, and went back to the lake today. I ran up and down the lake cruising 25- 30 and at speeds over 50. Hit wakes, tight turns, anything I could think to replicate the problems. Thought I'd fixed it. Started pulling my son on the tube, and problem resurfaced. It seems as though if you sit for awhile after stalling, it will run normally again for awhile. I'm wondering now if emptying the fuel filter was doing anything, and it was only working again because it sat for awhile, while I took the filter off and on. I put new plugs in last summer. I wonder if tight turns pulling the tube is doing something, but it seems to miss and stall while cruising in a straight line. I'm kinda stumped. Sorry for the rambling post. If anybody has any advice I would definitely be appreciative. Thanks.