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Buell Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » BB&D Archives » Archive through April 30, 2011 » Fuel light coming on with a full tank...... « Previous Next »

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Chrisrogers3
Posted on Sunday, April 17, 2011 - 09:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Alright guys,

Help me figure this one out.

My low fuel light is coming on with a full tank of gas. Why?

Where is the sensor (attached to the pump Im guessing)?

Any easy fix to it or do I need to replace the fuel pump?

THanks in advance!

Oh yeah one more thing, anyone have a part number for an exhaust servo?
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Natexlh1000
Posted on Sunday, April 17, 2011 - 10:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The sensor only has one wire.
If that wire is shoring to ground, the light will come on.
Check the wires that are EASY to check first; in other words, the ones not in the tank!

There have been a few "lucky" guys here that found that the fuel pump's wiring has rubbed through inside the frame/tank.
Knowledge vault has those stories.
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Rudy
Posted on Sunday, April 17, 2011 - 11:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

+1

Check the easy wires, first!

Otherwise, the wire probably rubbed through inside the tank. Pulling the fuel pump isn't terribly bad, but it requires the swingarm being removed. Although, I think I read somewhere that you could unhook the rear shock and jack the bike up enough for the pump to clear the swingarm? Can anyone confirm?

It's probably not worth pulling the pump just to replace the wire for the low fuel sensor. I only did mine because one of the other wires in the tank rubbed through on mine causing the ignition fuse to blow.
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Buelllightening
Posted on Monday, April 18, 2011 - 03:42 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

yes the pump does come out without removing the swinging arm ,but its tight!!!
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Etennuly
Posted on Monday, April 18, 2011 - 10:02 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Mind did this a couple years ago. The wires for the fuel pump were worn through to bare metal on the pump's frame inside the tank.

I did a write up with pictures back then. I should be in archives somewhere.

While you are doing this repair spend the $65 bucks to change your fuel filter and pickup screen, order an extra "o" ring because they tear easily. Use vasoline or the like to lube the "o" rings for install and be real careful on starting them, the edge is sharp.

Yes it can be done without removing the swing arm, remove the bottom shock bolt, jack the bike to where the tire is off the ground and push down on the tire to make sure you have all of the clearance you can get. The pump and its tubing will kind of screw out as it comes through it's opening. Make sure you pay attention to the orientation of how it comes out, it will need to screw in the same way.

I used heat shrink over each of the original wires and re routed them slightly so they were no longer subjected to the sharp edge. Remember electrical tape will not work in a fuel tank. Some folks took a dremel tool to the sharp edge to eliminate it.

Make sure your tank is very low on fuel or empty if possible, pull the pump in a well ventilated area. It is real difficult to catch the fuel as it flies out of the drain plug and when the pump comes out.

I think I did mine in about an hour and a half taking time to take pictures.
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Chrisrogers3
Posted on Monday, April 25, 2011 - 05:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Took the bike into the shop (since it is still under warranty), they are replacing the fuel level sending unit (I actually didnt know you could get that as a stand-alone part).

They replaced my front isolator right away while they were at it too! Way to go Appleton HD!
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