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Join Date: Apr 2003
Location: Colorado Springs, Colorado
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New to me 99 R1100S, fuel pump prob

Hello All,
I just acquired a 99 S that has been sitting since 2000, and am having some trouble getting it running. It would seem as though the fuel pump isn't running. Is there anything I can check apart from the fuse, before I run out and buy a new pump? Is there a preferred internet parts source?
This is my first BMW bike, and I am really looking forward to riding the thing provided I can get it to run.
Thanks much,
Tim Sexton

Colorado Springs, Colorado
Old 04-23-2003, 07:08 PM
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it's been sitting for a while, could the fuel filter be clogged? injectors?

have you checked the plugs?
Old 04-24-2003, 02:32 AM
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G,day Tim,
When you say that the pump does not run, do you mean that when you turn on the ignition without trying to start the engine, there is nothing happening, or do you get pump for a few seconds and then it stops? If the pump runs for a few seconds and then stops, that is normal. The computer controls the pump and it needs to be triggered by ignition pulses to run all the time. If you get nothing at all when the ignition is switched on, then I would check that there is power getting to the pump before I lashed out and bought a new one. You can check this with a test light or multimeter at the connector under the tank. You should get power there for a few seconds as described above. If there is something there, then it is time to go to the pump itself and see if there is any power there. If there is, then get a new pump,
If you don't have any power at the pump, there are relays and fuses in the boxes under the front part of the bodywork. These can corrode if they sit around for long periods of time, especially if there is a lot of dampness. It is not uncommon for contacts to stick under these conditions. That is where I would look next.
If you still have no luck after that, then you will have to delve deeper into the connectors etc around the bike and see if the problem is in something there. If all else fails, maybe it would be time to seek some professional help. It is possible to damage the ECU if you are not careful.
Hope this helps.

M Motor
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Old 04-24-2003, 02:33 AM
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Thanks for the replies!
I have verified that I'm getting voltage to the pump, it just never runs. What little fuel was in the tank didn't smell very good, so I'm afraid it may have fouled up the pump or the filter. Where's the best place to source a new pump and filter? Anything else I should check while I have the tank off, or as a result of it sitting for three years?
Thanks again,
Tim Sexton
Old 04-24-2003, 05:58 AM
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About $180 for the pump and another $20 or so for a filter. I'd do a complete tune-up and inspection of all the fuses too.
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Old 04-24-2003, 06:35 AM
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tuned fuses
cool
I GOTs to get me some O'dem
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Old 04-24-2003, 06:50 AM
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While you are at it, check all of the fuel lines. That gas sludge can make the fuel lines look like clogged arteries after sitting for 2 years. It would be a shame to replace the filter and pump only to be getting more sludge from the lines as the fresh gas start to break the sludge loose......
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Old 04-24-2003, 07:02 AM
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I'm running a thread similar to this one... except my fuel pump still works. Hammersley Cycle - $200 for the filter and pump... including shipping.

You guys pay a lot of money for your BMW hardware.
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Old 04-24-2003, 08:15 PM
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my bad pdonnel... I thought I saw $300 somewhere.
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Life should NOT be a journey to the grave with the intention of
arriving safely in an attractive and well preserved body, but rather to
skid in sideways, chocolate in one hand, martini in the other, body
thoroughly used up, totally worn out, and screaming,"'WOO HOO! What a ride!"
Old 04-24-2003, 08:16 PM
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i guess i'll just post my problem here too cuz i think it might be related. last night i tried to start up my S and ran into a problem. didnt want to start. upon turning the key everything seems normal. it was about 50 degrees and i put the choke on like normal. i cranked it and it fired but then died immediately. after numerous attempts with choke on and off i gave up. the best it would do is start up and run for a few seconds then the engine would slow and die. trying to give some gas while running killed it immediately. would only run if choke activated (but only for a few sec.)

last fall i had the 12000 mile tune up. over the winter it was garaged and battery was taken out, stabilizer etc. first warm weekend and i took her out, started no problem. have been riding every once in a while for the past 2 months no problems.

the past two - three weeks here have been poor riding weather so she's been under her cover (indoor/outdoor heavy duty all weather) for that duration. now this happens seemingly out of nowhere. not sure what it the problem is. any suggestions?
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Old 04-25-2003, 05:00 AM
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had to jump on the honda to get the cat food. fired right up. good old honda.
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Old 04-25-2003, 05:02 AM
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shannonnunley,
Nah. Should be about $180 for the pump.
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Roger,
Let me know where you find tuned fuses. As mentioned I prefer to "inspect" mine when electrical issues arise.
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Old 04-25-2003, 05:54 AM
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is it possible that my sparkplugs are bad? i'm gonna take a look at them tomarrow to eliminate that possibility. any suggestions if this fails?
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Old 04-26-2003, 05:51 PM
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Daniel

First thing that's not a choke but a fast idle lever.......so it dose about the same as opening the throttle about a 1/16 of a turn.

Check your gas it might be low if not.... give it full throttle while cranking once it starts running keep it around 2k for a min.

Fuel injection makes starting a lot different then a Carb.
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Old 04-26-2003, 06:50 PM
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Daniel,
Sounds a bit like you have water in your fuel. Pull the spark plugs and see if they look rusty on the electrodes. Have a good sniff of them to see if there is a strong fuel smell to them or not. Maybe remove the fuel filter and empty it into a container and check out the contents?
Just a stab in the dark from someone on the other side of the world!!

M Motor
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Old 04-28-2003, 03:05 AM
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thanks for the suggestions. i should have some fuel in the tank cuz i have only 60 miles on the trip counter. i'll check out the fuel filter.

pulled the spark plugs and the right one was dark but looked o.k. the left one had some oil on it which didnt sit well with me. not sure y it was oily but i dont like it. after i got the bike back from service this past fall i didnt really check to see if they overfilled it or not. not sure if that's even the problem. i hope it's not leaking somewhere expensive.

so, oil on the sparkplug. i'm gonna get some plugs and pop'em in and see if it runs today but would appreciate any more input in case this doesnt work and even if i do manage to start her up the whole oil thing is troublesome to me, maybe someone can put me at ease or something. thanks again for the responses.
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Old 04-28-2003, 04:54 AM
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