Happy Wanderer
04-04-2010, 07:17 PM
I have been working on my 96 R1100RT for a couple of weeks now trying to purge the surge with no luck. The last thing I did yesterday was put in new Autolite 3923 plugs knowing full well they would not fix whatever the problem is but I wanted to check that off the list. Once done I rolled the bike out of the shed and fired it up. As it was warming up I backed off on the "choke" lever to lower the idle and she just coughed and died.
Now what ??? I wondered. :scratch Started checking things and to make this short(er) it turns out the fuel pump decided to just die coincidentally after changing plugs. Weird but nice of her to do it just outside the work shed I suppose.
An old post by flyboyscd was really helpful in debugging. I should mention I know it is the pump because after making sure it was the pump and pulling it out I also hooked it up direct to the battery and you can feel it sort of click and stall. It is stuck or just broken and will not spin. I might cut it open just for fun but as I took the filter sock off I found a small piece of brown plastic in the pump inlet. A few more bits of plastic shrapnel were in the filter sock too. Hmmmm... this is not good says I. http://tinyurl.com/yh6fzom
I siphoned what was left of the gas out till I could inspect the bottom of the tank and found there was a much longer shard of the same plastic in there along with other really small nasty bits including a very tiny shard of some metal. I got a nice clean rag and sopped up the little bit of gas in there and cleaned the bottom of the tank thoroughly. http://tinyurl.com/ylkt9k3
BMW wants over $300 bucks for the pump so I hunted and found this OEM replacement from Euro Motoelectrics for $139. http://tinyurl.com/yhzgrj5
http://tinyurl.com/yhzgrj5
The original pump has screw post connectors and the replacement comes with push on connector tab style wiring so a bit of soldering will have to be done. I hope this pump works and fits well. I do wish they would have included new screw clamps because obviously they will be needed.
I looked at the wiring and assembly of the fuel pump and filter unit and understand all that pretty well but inside the tank there is a part I am not sure of. Maybe someone out there knows. There is a long metal tube with a spring inside of it that attaches to a plate at the top of the tank and goes all the way to the bottom where you can see that spring inside the tube . There are two blue wires attached to it with a cable tie that go to a connector on the fuel pump assembly. http://tinyurl.com/ycnptol
My questions are:
- What is that tube for?
- What are the two blue wires for? Is there a switch of some kind in there?
I thought the fuel float and wiper was the only fuel measuring parts in there but now I wonder if that tube and plug are also for fuel measurement. :dunno
I plan to reassemble using normal screw type fuel line clamps. If anyone out there has any tips or advice for me on re-assembly so I don't have to take it apart again that would be much appreciated!
Meanwhile, I will keep scouring the forums and learning. :lurk
Now what ??? I wondered. :scratch Started checking things and to make this short(er) it turns out the fuel pump decided to just die coincidentally after changing plugs. Weird but nice of her to do it just outside the work shed I suppose.
An old post by flyboyscd was really helpful in debugging. I should mention I know it is the pump because after making sure it was the pump and pulling it out I also hooked it up direct to the battery and you can feel it sort of click and stall. It is stuck or just broken and will not spin. I might cut it open just for fun but as I took the filter sock off I found a small piece of brown plastic in the pump inlet. A few more bits of plastic shrapnel were in the filter sock too. Hmmmm... this is not good says I. http://tinyurl.com/yh6fzom
I siphoned what was left of the gas out till I could inspect the bottom of the tank and found there was a much longer shard of the same plastic in there along with other really small nasty bits including a very tiny shard of some metal. I got a nice clean rag and sopped up the little bit of gas in there and cleaned the bottom of the tank thoroughly. http://tinyurl.com/ylkt9k3
BMW wants over $300 bucks for the pump so I hunted and found this OEM replacement from Euro Motoelectrics for $139. http://tinyurl.com/yhzgrj5
http://tinyurl.com/yhzgrj5
The original pump has screw post connectors and the replacement comes with push on connector tab style wiring so a bit of soldering will have to be done. I hope this pump works and fits well. I do wish they would have included new screw clamps because obviously they will be needed.
I looked at the wiring and assembly of the fuel pump and filter unit and understand all that pretty well but inside the tank there is a part I am not sure of. Maybe someone out there knows. There is a long metal tube with a spring inside of it that attaches to a plate at the top of the tank and goes all the way to the bottom where you can see that spring inside the tube . There are two blue wires attached to it with a cable tie that go to a connector on the fuel pump assembly. http://tinyurl.com/ycnptol
My questions are:
- What is that tube for?
- What are the two blue wires for? Is there a switch of some kind in there?
I thought the fuel float and wiper was the only fuel measuring parts in there but now I wonder if that tube and plug are also for fuel measurement. :dunno
I plan to reassemble using normal screw type fuel line clamps. If anyone out there has any tips or advice for me on re-assembly so I don't have to take it apart again that would be much appreciated!
Meanwhile, I will keep scouring the forums and learning. :lurk