VFR750 fuel pump problem

[andym]

I decided to try starting my VFR today (first time in over 2 years), when pressing the start button the fuel pump will give 1 click then not do anything else, it's the same when I connect a couple of wires to the plug and touch the battery terminals..... but if I tap one of the terminals rapidly with one of the wires it will drag fuel out of the temporary tank (petrol can).

I always thought fuel pumps had a constant 12v when starting or running to keep fuel flowing, but after tapping the wire I'm starting to think it's a rapid pulse

Is the fuel pump just f**ked or sticking?

[Nobby the Bastard]

[MCN]

I had the fuel pump on two BMW R1200GS fail coz the resistor on the wee card that controlled the pump burned out. (Induction issue).

The get around was to by-pass the wee card and drive the pump directly off the battery using a jumper cable made from a Deutz connector and croc clips to the battery.

The pump would run constantly that way but would get you out of a bind/the shite.

The wee card controlled the fuel pressure by pulsing the power supply to the pump. The make and break was what fooked the resistor on the card.

I do not know what your pump is made like but it could be connected. (no pun).

Sorry for the Tefer-esque post big yin.
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

[stinkwheel]

My understanding is it's an intermittant switch inside the pump (although I've never had one apart). You should hear several clicks until it's up to pressure.

They have a set of mechainical points in them which can be replaced for just under £20.

I'd check this first. The contacts may even just need filing/cleaning.

https://www.wemoto.com/bikes/honda/vfr_750_fl__rc36/90/picture/fuel_pump_repair_kit_-_point_switch/
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[andym]

[andym]