Re: humming fuel pump

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <000001be3d99$f929a820$53d828ce@jess> "Jess C. Almero, Jr." writes:

> Two weeks ago the fuel pump in my '90 90q20v started humming like an
> electric shaver so I had it replaced.  Then last week the humming returned
> but only after driving distances in excess of ~50 miles.  Brought it back to
> the mechanic and of course could not duplicate the sound without pinching
> the hose that feeds the pump.  It was buzzing a little louder than I
> remember it doing ever before which the mechanic insisted is normal.  I also
> replaced the fuel filter to see if that would have an effect.  Any ideas?
> Fortunately(?) the pump hasn't reached the sound level of the original pump.
> I was at a stop light and everyone was looking around to see what all the
> buzzing was about.  Maybe I'll just tell everyone that I have the latest
> electric powered Audi.  Anyone BTDT?

They buzz if they're supply-constrained, so you might have a tank exit
blockage.  Also, if there's a sediment trap fitted, bubbles of air
in that make a sound _exactly_ like a humming pump.  Finally, did the
machanic replace the rubber suspension bushes?

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
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