I re-did the fuel pressure test. For some reason all of the results were different. Since i dont have access to most of my tools (they are in NY) i borrowed the fuel pressure test kit from AutoZone. The 90 degree adapter i need to clear the throttle link was tough to get on and allow fuel to flow through it. The rubber inserts that seal it are a little deformed and they were hard to get a seal out of. I had to tighten it down quite a bit and I think that restricted the flow a bit. With all of that said.....
With the pumps on and engine off.....51psi
Pumps off, engine off.....45-46 psi
Engine at idle, vacuum line off of regulator....51psi
Engine at idle, vacuum line on . 46psi and not very stable. Appears to be jumping around between 45-48
Boat underway at every speed and load. In other words, accelerating, decelerating, on plane and maintaining speed. The pressure jumps around a bit 45-48. Not slow variations but the gauge is fluttering for lack of a better word.
Clearly the pressures are somewhat high. This fuel cell has the regulator that is on the cell itself, not the one on the fuel rail. I have no way of knowing if this is the original cell or not. I have most of the service records at home which i did look through when i got the boat but don't recall the fuel cell being replaced. I tried to find the recall/SB that was mentioned and couldn't find anything. Im going to get another gauge and double check those readings. If they are correct i'm assuming im looking at a new regulator. If it needs to be replaced, then it is what it is.
I know there have been issues with these fuel pumps, paint chips and alcohol additives to fuel. As i understand it there are two types of additives. Ethenol and Methenol. When i did the motor, i flushed the fuel rail and screened everything that i ran through it. There was no indication of any paint in the fuel rail. I also inspected the screen on the fuel rail with the same result. Point being that i dont think i have an issue with this.
If the fuel cell is original then it has upward of 800 hours on it. As i mentioned in an earlier post, the pump sounded quite loud and i was thinking the LP pump might not be working properly because of a corroded connector. I replaced the connector and the pump stopped making the noise. I can still hear the pump running but i have to get pretty close to hear it. I am assuming it is normal to get some sound from it.
So far, i have run the boat for about 4 hours at various different speeds, loads and RPMs and it still isnt throwing any code.
Thoughts?