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Fuel Pumps

Fuel Pumps

Would whoever is knowledgeable about the fuel pump transistor change, please
again describe for us newbies?
     I could use the info on the flex radiator fan also if someone would also
respond on this. Am I better off putting an electric fan on front and rear of
radiator and removing mechanical fan?  Central Florida weather.
Steve McDonald

I have to dig the fuel pump info out. There are 2 different circuits
depending on the polarity of the car.
For what it's worth, I try to always install the electric fan on the
inside of the radiator and removing the driven fan. That cuts down on
noise and seems to add to engine rersponsiveness. Probably a function of
noise. Also less wear and tear on the belt and water pump.
George Badger


Both positive and negative ground conversions are documented on the web
site at System
The positive ground version I tested the negative ground version I did not.

Dick White

After my fuel pump giving up the ghost a number of times ( always at the
worst possible time and at the worst possible place ) I have replaced it
with an electronic S U fuel pump conversion kit . It fits inside the
existing cap and is easy to fit. It can be obtained from Autoflux in the UK
( Phone 01579 320459 ) at 45 Pounds.

Roger Herrick

Thanks for the tips re the fuel pumps.  I had a friend who was
transistorising his pumps (3.8 150 S) here recently and sent him a print
out of the web site article, so I hope he makes it work and translates the
article into Aus for me (i.e. local suppliers of the necessary parts etc).
 In the meantime, I will keep thumping as required - the 120 has jammed
brakes too - damn!
Regards, John Elmgreen

The necessary electronic parts for the fuel pump are available at Dick
Smith Electronics in Australia and New Zealand.

The transistor and diode are as specified in the Website article and the
transistors are catalogue number MJE2955T (PNP) for negative earth and
MJE3055T (NPN) for positivr earth. Total cost about $5.00.
Regards, Michael Standley

Michael S:  Thanks for the tips re the transistor / fuel pump parts in
Sydney.  I will pass the details on to Ian Hutchinson (XK150 S DHC 3.8).
Regards, John Elmgreen

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