fuel pump fault

[minivin]

ah crap, not having much luck with the R11S, 2002 EVO-II model and now the fuel pump is playing up

Went to fill up with fuel earlier, filled up, and then turned the ignition on. Normally I'd hear a "WIRRRRR" from the fuel pump, and the "Eih!" when the ABS had also pressurised, well, no whirr this time but a "Bleuuuuuuugh" sound. "That aint clever" thought I but the bike started, but with a smell of fuel in the air.

Off to MAG, and left early, went outside, ignition on, no sound from the fuel pump, the bike struggles to start and after a little bit dies. Couple attempts with the starter motor proves something aint right. Side stand up just in case, still nothing, ignition on, ignition off, ignition on, ignition off, nothing. Hand's clasped into a grasp and the top of the fuel tank on the filler neck beaten three times, ignition on, "Bleuuuuuuugh", twat

Anyhoo, the bike then started with no problem, but the smell of fuel was there again, looked around, and under the two breather pipes by the rear brake lever peddle was a small pool of fuel on the ground.

Without too much thought in case it died again, on the bike, and quickly home.

When I get home, ignition off and instead of the sound of a reasonably constant stream of bubbles, I get a couple bursts of large sounding bubbles, but that's it.


So, my thoughts at present are:

i) Dodgy fuel pump
ii) fuel filter partially blocked
iii) Some fuel pressure valve knackered if there is one
iv) blocked pipe to the tank.
v) fuel relay narked.

Anyone else got any pointers. as this could get quite expensive since it's fuel injection, and I was hoping not to have to go for Mikuni flatsides until the bike had done another 44k miles

[sproggy]

If you had fuel coming out of the breathers which aren't connected to the pump in any way I'd guess at some sort of problem with pressurisation of the tank (positive or negative). It sounds as if the pump's struggling to work against the pressurisation. Try blowing through both breather hoses from the bottom end both with the filler flap open and closed.

When you undo the filler flap is there a 'whoosh' of air coming out or going in? If it's pressurisation this 'whoosh' will be worse the further you've ridden.

If the bike won't start again after a long run, does opening and closing the filler solve the problem?

I haven't experienced this problem myself on a bike (I did in a car) but I doubt that a fuel pump/filter fault is to blame, although if you keep riding the bike as it is the pump may die as a result of having to work too hard.

[minivin]

Ok, just checked by opening the cap and nothing, so either the pump, connectors for it, or summit obscure