Is my fuel pump cactus?

68notch Casual Dubber

32 posts · joined May 2003 · 14 Dec 2004, 2:50 pm

#279618

Hey all,

My 1776 type 3 was running fine and now it's farting and cutting out when I give it a bit of throttle. I didn't make any changes to cause this - it just happened on it's own.
It seems to be starving for fuel. I have removed the inline filter and blown through it and it seems fine. It filled with fuel pretty quickly when I started the engine so the pump is pumping something! I don't really know how to test it without a pressure gauge.
So...would the problem be fuel or electrical? Does this sound like a dud pump or a dud coil or a fuel blockage or something else? Any pointers greatly appreciated!

Points gap is correct, valves are set at 6 thou (cold!) carbies are freshly rebuilt, fuel tank and lines should be clean, battery is fully charged, owner is pulling his hair out!

Regards,
JT

Doug Sweetman Nil Bastardo Carborundum

2,128 posts · joined Sep 2002 · 14 Dec 2004, 4:35 pm

#279649

What sort of carbies ? The weber people will say blocked idle jet I guess, but it certainly doesnt sound like a fuel pump issue to me.

68notch Casual Dubber

32 posts · joined May 2003 · 14 Dec 2004, 10:28 pm

#279837

Running standard Type 3 Solex PDSIT dual carbs which have about 3 hours of running time on them!?

The engine will idle (roughly) for a short time without any throttle. Wouldn't the idle jet not be relevant since the prob is only under any kind of acceleration? I am no expert on carbs though...

[Edited on 14-12-2004 by 68notch]