Wax in your ears? Seriously, if you ran the carbs dry then reconnected the
pump and the filter filled up the pump must be pumping. But if it has
suddenly got very quiet, and you are getting what looks like fuel
starvation, then perhaps it is only pumping very weakly. Take a feed pipe
off a carb (watch out for a spurt if the ignition has been on recently)
direct it into a container and switch on the ignition. It should pump at
the rate of about 1 pint in 30 secs.
Original pumps before 1977 had capacitor points quenching which means they
are *NOT* polarity sensitive i.e. there were not positive and negative
ground versions, hence you can change the polarity of the battery without
doing anything to the pump. Later pumps (AZX types) use diode quenching
which *ARE* polarity sensitive, so you should get the one that matches your
battery polarity as it is now. If you use the wrong one the supply is not
fused and it will cook the wiring and/or blow the diode in the pump. As an
aside it is an easy matter to fuse the pump by using an in-line with bullet
ends where the boot/trunk harness joins to the main harness at the mass of
connectors by the junction of the firewall and right-hand inner wing. A
standard 17amp rated, 35amp blow fuse will be fine.
----- Original Message -----
From: "joseph cianciotti" <jmc987@earthlink.net>
To: "mg mailing list" <mgs@autox.team.net>
Sent: Wednesday, November 20, 2002 10:54 PM
Subject: Fuel pump problems?
> When I started the B this morning there was no familiar "click-click" from
> the fuel pump. But the car started well and off I went. However on my way
> home, the car started hesitating like it was running out of gas and, in
> fact, died. After cranking, though, it started right up. It hesitated a
> couple of other times and even died again. But after a bit of cranking, it
> restarted and I was able to get home.
>
> When I got home I checked to make sure the pump was getting electricity
and
> yes it was. I even turned the fuel pump off so the carbs would run dry.
When
> I turned the pump on, my clear fuel filter filled with gas. But the pump
> only clicked on one occasion. But the engine never died on its own.
>
> And if I do need to replace the filter. I notice that Moss has positive
and
> negative ground pumps. I converted my B to negative ground. Which one
should
> I get? (Right now, I've got a positive ground pump it there.)
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