Originally Posted By Richard Wood

No the sender on the M3W is separate from the pump although there was one integral to the pump for use on other applications such as Land Rover.

The earth connection to sender is a tag in wiring loom which connects to the senders body via one of its mount bolts as you suggest.

Picture here of 280mm sender with 750 ohm shunt resistor fitted.



This gave the best results for me although there were still random fluctuations. Generally I only got a consistent 0% gauge indication after at least 200 miles with plenty of reserve.


What is the purpose of the shunt resistor? I could certainly understand a shunt capacitor to remove any stray AC. I can easily order a 750Ω resistor. I have a wonderful case of tennis elbow on my right arm at the moment and was not looking forward to removing all those screws on the boot liner. However, I have now treated myself to a Milwaukee 1/4" cordless ratchet and a set of 1/4" square drive screwdriver bits (I already have a large set of 1/4" sockets, metric and AF), so it will now be very easy. I also have to take the pedal box cover off as well, to replace the worn out friction coating on the clutch pedal with glued on emery cloth, where the Milwaukee will be perfect.

Wilson