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andym |
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andym World Chat Champion
Joined: 16 Nov 2010 Karma :
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Posted: 15:33 - 13 May 2018 Post subject: VFR750 fuel pump problem |
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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? |
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
Joined: 16 Aug 2013 Karma :
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MCN |
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MCN Super Spammer
Joined: 22 Jul 2015 Karma :
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Posted: 18:14 - 13 May 2018 Post subject: |
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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. ____________________ Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN. |
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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andym |
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andym World Chat Champion
Joined: 16 Nov 2010 Karma :
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Posted: 20:00 - 13 May 2018 Post subject: |
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I did have the pump apart about 4 1/2 years ago as one of the wires got disconnected so I had to solder it back in place, so at least I know where that part is |
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andym |
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andym World Chat Champion
Joined: 16 Nov 2010 Karma :
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Posted: 14:55 - 24 May 2018 Post subject: |
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Quick update to this thread, you were almost right stinkwheel.... one of the plates had somehow managed to get over a lip so wasn't making the correct contact (highlighted section on the attached pic.
I managed to push the plate back in to place and the petrol was making short jumps along the temporary fuel line until it got to the carbs.... and after about a minute of trying to start the bike it fired up without too much fuss |
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Old Thread Alert!
The last post was made 5 years, 338 days ago. Instead of replying here, would creating a new thread be more useful? |
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