On Fri, 22 Aug 1997 12:56:58 -0400 Adrian Jones
<AdrianJones@compuserve.com> writes:
>Hi folks,
> Thanks to John Nelson for pointing out an electronic fuel pump
>fr=
>om
>Pep Boys for $30. (that looks exactly like the one in the Moss
>catalog). =
>
>Let me know if you want more details about the pump.
> Anyway, I put it in and it seems to work just fine. Here's
>some
>questions:
>On turning just the ignition on, the old SU pump would beat for about
>10
>sec then stop. This electronic one just keeps on ticking away and
>doesn'=
>t
>stop. Is this normal?
>Needless to say, I didn't bother reading the 2 page instructions that
>cam=
>e
>with the pump until after I had finished. It says someplace that " If
>th=
>e
>original pump is a combined fuel and vacuum pump then leave the pump
>in
>place. Disconnect the fuel lines from the pump and attach them
>together.=
> =
>
>Do not remove the other vacuum lines" What does all that mean? There
>wa=
>s
>a hose (vacuum?) that was connected to the old SU. Is the SU a
>combined
>fuel and vacuum pump?
>The instructions also say to position the pump so that the output end
>is
>uppermost. I hate to ask, but is that necessary? If so, I'll have
>crawl=
>
>back under and reposition the bloody thing.
>
>Adrian
>
I've got similar pumps on both my cars, as well as my son's 73 Midget,
and all have the same, continous pumping, so it sounds like it may be a
characteristic of the electronic pumps. I have noticed that the sound
changes tone when I run out of gas (I have been known to forget once, er
twice, er....).
The reason for mounting the pump witht he output uppermost, is to aid in
priming the pump. With the inlet on top, the curve the line sometimes
makes, can trap an air bubble and starve the pump. They don't do air
very well.
Rick Morrison
72 MGBGT
74 Midget
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