Boat Repair Questions? Ask a Marine Mechanic for Answers ASAP
Hi my name isXXXXX will assist you.
What you have here is a fuel restriction in the boat side fuel system starving the engine for fuel. Run the engine on another fuel source, if the engine runs better you have a restriction in the fuel tank clogging the pick up tube or a restriction in the fuel supply line from the tank. If the engine runs the same you need to check for restrictions in fuel pumps and filters.
fuel pressure is @ 40 psi going to tbi. spec is 30 psi +or- 1 seems to be getting more
than enough fuel, mechanic tried adding more fuel and air created worse bog.
I whatched the injectors as opening throttle wider and there seems to be a
considerable amount of fuel pouring out of the injectors.I myself was squirting fuel in
to tb trying to increase rpm but it would bog worse .
Could you please explain how to do the vacuum test.
Iwill try this on the week end and let you know the results.
Hello Tan, I ran the boat yesterday with a seperate fuel source, the engine reacts the same still boging under load, no power can not plain out and engine becomes noisy
like its working hard.If I try going WOT the engine want's to stall.I'm thinking of running
a new fuel line from the low pressure pump to the high pressure pump the old line looks
fine from the outside, but it has a braided material on it and you really can't tell what the
line is doing under higher load like perhaps collapsing.I'm totally guessing on this.Is it
worth a try?Do you have any other idea's?
I don't think I have a vst reservoir I have no access to the boat untill later on this evening but what I recall is the inlet is just above the fuel filter and pump is above.
I will check this out and let you know.
it's a 5.0 gi pwtr volvo penta XXXXXXXXXX year 1999
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