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From: Stan Gardner (no email)
Date: Mon Dec 03 2001 - 07:59:31 EST
I have a pair of big Fram filters, one a separator, the other a
filter. Seems one of them often fails to seal when I change the elements,
the engine lift pump then sucks air and eventually the engine dies.
I have installed an electric fuel pump in front of the filters, but after
the fuel tank selector valves. If there is a leak anywhere down stream of
this pump it will drip when the pump is left on for a few minutes. The
pump will also slowly cycle letting you know there is a leak even if it's
leaking air because the filters are not yet full of fuel.
Another major advantage of this pump is that if something stops the flow of
fuel, (a clog or air leak) this pump gets me going again after fixing the
problem. I turn the pump on and go down the line bleeding air from the
system. In my case this is the two Fram filters, the two filters on the
Ford Lehman engine and two bleeds screws on the injector pump. This whole
process takes less than five minutes and has been a life saver.
When running the engine normally I leave this pump shut off and the small
restriction in the line is not a problem. This pump would also temporarily
replace a failed lift pump at the flip of a switch.
For leak detection the closer you can get to the tank the better. I have
three tanks and it just wasn't convenient to put the pump anywhere but in
front of the filters.
At 08:15 PM 12/1/01 +0200, Alex wrote:
>Hi all!
>
>Can anybody come up with a smart way of locating the source of air in the
>fuel. I went across the whole system tightening down clips and bolts,
>still air gets sucked in somewhere.
>
>Alex Verhovsky
>s/y Tangra
Stan Gardner ~~~_/) ~~~ Schlumberger
Automated Test Equipment
Senior Mechanical Engineer Probe Systems
Tel - 408 586 6532 150 Baytech Drive
FAX - 408-586 4654 San Jose, CA
95134-2302
Email -
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