Re: [DML] Re: Fuel Accumulator

[mike.griese@xxxxxxxxxxxxxxxx]

The tank is a pretty good echo chamber.  Once that pump vibrates
and the fuel level goes down it can resonate pretty well.  When I 
first got my car, we drove it from New Mexico to Minnesota in 
September.  Along about the badlands, I started to hear a vibration 
coming from what sounded like the right front footwell.  It got louder 
as time went on.  We pulled in to Wall Drug for lunch and gas, and 
when we hit the road again, the noise was gone.  The only difference
was fuel level and some cooling.  It still gets pretty warm in South 
Dakota in September, so I think that was a contributor to the intensity
of the sound.  Ever since then, I have been able to count on a buzzing
from the fuel tank as a reliable indicator of low fuel - much better than
the tankzilla low fuel indicator lamp.  I've had the car since 1993 and
haven't had to change out the pump.

Another possible source of the sound is a pinhole leak in the intake
hose.  Even a small leak is enough to draw some air into the pump
once the fuel level goes down a bit.  The cavitation caused by the 
air is pretty noisy. 

--
Mike


-------------- Original message from "denverdelorean" <denverdelorean@xxxxxxxxx>: -------------- 


> 
> 
> 
> I just dont see how the sound could be coming from the pump. I 
> literally had it out of the car in my hand pumping gas to the 
> engine. ther was no excessive vibration or noise coming from the 
> pump. but there was still sound coming from the transmission area. 
> Could sound really be transmitted through a rubber hose that 
> loudly? AND it is a brand new pump. The problem also dissapears if 
> the car sits over night. 
> 

[Non-text portions of this message have been removed]






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