Message text written by "McMahon, Jack"
>Hi folks! My electronic fuel pump is talking to me like a woodpecker and
the engine cut out on me twice today. I have one of those 3 inch square
Moss solid state jobs completely by-passing the mechanical pump. It always
made a little tic tic tic noise that I could only hear prior to firing the
engine. Now I can hear it singing over the engine noise. Is there someone
I can do other than just buying a new fuel pump? Thanks in advance for
your
help.
<
That extra noise is usually due to lack of fuel. It serves as your
out-of-fuel indicator. ;-) If you have fuel in the fuel tank then I'd
look for an obstruction in the fuel line or vapour lock.
I suppose that the check valves in the pump could have gone bad but the
usual failure mode is to not work at all.
BTW, the manufacturer requires (or else the waranty is void) a filter
before the pump. If you don't have one then maybe the check valves are
clogged with fuel line sediment in which case you not only need a new pump
but a new filter, too.
So, what tests can you run before buying a new pump? I suppose the first
question is does it do that all the time. If so then your job is easier.
Just hook the pump inlet to a hose whose other end is in a jerry can of
fuel and see if the problem persists. If it does, try a new filter and
then a new pump.
If not, then I would plug in a new filter and see if the problem re-occurs.
If it does, get a length of hose and some copper line and make up a line
that drops into the fuel filler, through the passenger compartment, to the
pump inlet (for testing purposes only, of course) and see if that cures the
problem.
If you are in a hurry you can buy a new pump, pull the tank and have it
boiled out at a radiator shop and blow out the fuel lines with compressed
air. That and a new fuel filter and your all set.
Cheers
Dave
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