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ckcarr's Avatar
 
Join Date: May 2000
Location: Moab Utah. Home of wierd red & orange radioactive stuff...
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R1100S Dying Intermittently - What Possible Causes

New fuel pump, Petrol gauge, hoses, tank clean.

When put back together, it started right up, sounded perfect.

Took for a trial run, made it around 28 miles away, then it dies. Spring break traffic flying endlessly by. Fuel pump not making any noise. Then around 15 minutes later, I turn the key and hear the whirring of the pump, and bike starts up. So I turn around, and almost make it back home. But it has to die one more time... So, sat on side of road for around 10 more minutes, then turn key, pump whirrs, and I make it home.

At first I was placing blame on the fuel pump?? But started thinking, could a bad ignition switch cause this? Are there any electrical parts that might heat up and fail intermittently?

Any ideas? I mean it could be the fuel pump, but seems unlikely, as the first one did die and this was the replacement they sent me. On the other hand, it could be a bad batch of little pumps?

Thanks!

New on bottom, old on top with decayed wiring...

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cRaIg CaRr
2000 Dyna FXDX, 2000 R1100S, R1200S, rNineT, F800GS, S1000XR, Jeep Rubicon, 2001 Corvette, 1978 Porsche 928. 22 pairs of shoes. 24 bottles of beer.
Time Marches On and gone: 2010 F800GS, 2015 F800GS, 2007 R1200S, 2003 Dakar, Buell 1125r, 2001 F650GS. 1999 F650. 1998 HD Sportster Sport. 2010 F150, 1995 GMC Sierra ALL GONE

Last edited by ckcarr; 04-03-2021 at 01:34 PM..
Old 04-03-2021, 01:31 PM
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How’s the battery? Mine behaved in a similar fashion, replacing the battery cured it.


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Old 04-03-2021, 01:54 PM
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Had not even considered that since the starter turned... But, you might be onto something.. 04/20/15 battery. PC680

There's no feeling quite like having the bike suddenly stop all functions...


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Originally Posted by ergbert View Post
How’s the battery? Mine behaved in a similar fashion, replacing the battery cured it.


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cRaIg CaRr
2000 Dyna FXDX, 2000 R1100S, R1200S, rNineT, F800GS, S1000XR, Jeep Rubicon, 2001 Corvette, 1978 Porsche 928. 22 pairs of shoes. 24 bottles of beer.
Time Marches On and gone: 2010 F800GS, 2015 F800GS, 2007 R1200S, 2003 Dakar, Buell 1125r, 2001 F650GS. 1999 F650. 1998 HD Sportster Sport. 2010 F150, 1995 GMC Sierra ALL GONE
Old 04-03-2021, 05:03 PM
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When it dies, do the lights stay om and engine just stops? Or do the lights shut off too?
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Old 04-03-2021, 05:08 PM
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I wish I would have looked but I didn't.

The bike is in the garage now and has been on the battery tender for a couple hours and yes, the fuel pump energizes... And it starts.

I wonder how independent everything is, the fuel pump, lights, starter... Like the starter might turn but not enough to turn on the fuel pump? That seems a little weird, but seems the pump is OK.. Since it's running. Unless it gets tired and takes naps...

I should probably replace that battery anyway. Since it's six years old, and maybe sat in a warehouse for a couple more.

I had forgot how much fun that bike is!
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cRaIg CaRr
2000 Dyna FXDX, 2000 R1100S, R1200S, rNineT, F800GS, S1000XR, Jeep Rubicon, 2001 Corvette, 1978 Porsche 928. 22 pairs of shoes. 24 bottles of beer.
Time Marches On and gone: 2010 F800GS, 2015 F800GS, 2007 R1200S, 2003 Dakar, Buell 1125r, 2001 F650GS. 1999 F650. 1998 HD Sportster Sport. 2010 F150, 1995 GMC Sierra ALL GONE

Last edited by ckcarr; 04-03-2021 at 05:25 PM..
Old 04-03-2021, 05:22 PM
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Check the fuel pump fuse also.
It might be fuse number 2 depending on what year
R1100S.
Old 04-03-2021, 10:32 PM
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Bad kill switch or wires? There was a batch of bike that had problems because the wires to the handlebars were overtightened at the factory. I'd also take the housing apart and see if there is corrosion on the switch components.

Bad sidestand switch? Easy enough to jump.
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Old 04-04-2021, 02:29 AM
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Since it happened right after you replaced the fuel pump plate. I would consider the connection to the fuel pump inside the tank and the fuel pump connector outside the tank. Maybe one or the other has a defective pin or one that's not making good contact with its mate.
Old 04-04-2021, 03:42 AM
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Plenty of info on here already to check, the fact it starts after the bike has been standing...breather pipe clear? Vacuum in the tank, or as a quick fix try riding with the filler cap open.
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Old 04-04-2021, 07:32 AM
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Is there a relay for the fuel pump? Pretty sure there isn't on the 11?
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Old 04-04-2021, 08:32 AM
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Good suggestion.
Yes there is a fuel pump relay .
The Haynes Manual said it's on the left hand side, second from the rear.
So, on the left hand side, first from the rear is the Turn Signal Relay.
Then, second from the rear is the Fuel Pump Relay.
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Old 04-04-2021, 09:55 AM
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How much would you take for it today?
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Old 04-04-2021, 11:38 AM
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It's very shiny!
And they'll be collectables someday too!!

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How much would you take for it today?
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cRaIg CaRr
2000 Dyna FXDX, 2000 R1100S, R1200S, rNineT, F800GS, S1000XR, Jeep Rubicon, 2001 Corvette, 1978 Porsche 928. 22 pairs of shoes. 24 bottles of beer.
Time Marches On and gone: 2010 F800GS, 2015 F800GS, 2007 R1200S, 2003 Dakar, Buell 1125r, 2001 F650GS. 1999 F650. 1998 HD Sportster Sport. 2010 F150, 1995 GMC Sierra ALL GONE
Old 04-04-2021, 02:50 PM
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classic clogged fuel tank vent.
try opening the filler cap see if it runs again.
Old 04-05-2021, 06:14 AM
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You may be onto it too Brent.

I did open the cap while sitting there, and then it did start back up after sitting a bit. Could be that my internal hoses are too long and kinking somewhere?
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cRaIg CaRr
2000 Dyna FXDX, 2000 R1100S, R1200S, rNineT, F800GS, S1000XR, Jeep Rubicon, 2001 Corvette, 1978 Porsche 928. 22 pairs of shoes. 24 bottles of beer.
Time Marches On and gone: 2010 F800GS, 2015 F800GS, 2007 R1200S, 2003 Dakar, Buell 1125r, 2001 F650GS. 1999 F650. 1998 HD Sportster Sport. 2010 F150, 1995 GMC Sierra ALL GONE
Old 04-05-2021, 06:57 AM
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In normal operation the fuel pump is triggered by the key being turned on and runs for a few second. After that it requires a signal from the Halls sensor that the engine is actually rotating. if you don't hear the pump when you turn the key on it rules out a vacuum lock in the tank.

Start by replacing the fuses, easy and cheap. There is one on the left side that powers the fuel pump. Remember TOR 2011? See post #416 and #430.

2011 Top Of The Rockies Rally - 7/28 to 7/31

I am also a fan of Halls sensor failure. The fact that it works after cooling down has been electrical problems for me.

Good luck.

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Old 04-05-2021, 09:19 AM
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