advice with fuel issue

[mbw]

Hi

I need some help please!!

I'm having a problem with my cruiser. It has started to play up and has been getting worse.

I had a trip this last weekend and on the way home i started to loose power, at first when I kept the pedal down it would come back to life and run normally for a while, but it got worse. eventually to the point where It cut out totally, then I would have to pull over crank it a bit, then slowly start start building the revs up and I could take off for about 30 seconds, then have to repeat the process.

It played up a couple weeks ago and I thought it might be bad fuel, so I changed the fuel filter and cleaned out water/fuel separator.

I've just started it and let it rev until it cut out and taken fuel filter off. It was only about a quarter full.

Could it be a dodgy fuel pump? is there another filter in the fuel line that could be blocked?

Any advice would be greatly appreciated.

[Weemsy]

It sounds like it could be sucking air, check the fuel lines from the tank up to the lift pump, if these are clear lines, have a look for air bubbles in the fuel line while the engine is running.
To get a definately check, by pass all the fuel lines by piping a jerry can directly to the pump and see if that cures it

[mbw]

Thanks,

Do they have any sort of filter from the separator back to the tank?

I thought I might try blast some compressed air down the line to see if I can dislodge any possible blockages???

[lexlux]

is it a 80

[mbw]

its a bj74, 13bt motor

[Heath]

The pick up may have a gauze filter, but I'm guessing a perished hose with a little crack letting in air between the tank and the pump.

[mbw]

Just out of interest, could it possibly be caused by the fuel cap not releasing the vacuum pressure?