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BigAndy121

Joined: 28 Aug 2009 Posts: 3 Location: UK
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Posted: Mon Aug 31, 2009 10:59 am Post subject: Help with missfiring K1100lt |
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Hi Guys
Firstly thanks for a wonderfull site.
I have just purchased a 94 1100lt, in reasnable nick for its age and 88000 miles. However when I was riding it home it started to missfire when I tried to increase the throttle, badly spluttering and the occasional backfire, if i pulled the throttle further it just died, ease of the throttle a bit and it went again. This initially started to happen at about 4000rpm but as the engine heated up it got proggresivelly worse until I eventually had to stop, at this point the temp guage was about half way up. when i let it cool down for 10 minutes it seemed semi OK again revving up to 5500rpm before the spluttering started, eventually I had to stop again.
Since getting the bike home I have tried a few diagnostic tests and found error code 1133, also the TPS test proved it needed adjusting, which I have done and according to the test its fine now. The fan test comes up with 3333 but I don`t hear the fan coming on. Any help would be greatly appreciated.
ATB
Andy  |
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Jim Site Admin

Joined: 17 May 2003 Posts: 3841 Location: WHERETHEFUNNEVERENDS
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Posted: Mon Aug 31, 2009 2:23 pm Post subject: |
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could be the tps - could be a bunch of things. If you don't know when the fuel filter was last changed, change it. _________________ Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000
"We shall not all die, but we shall all be changed." |
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Flying Duck PsyKotic Waterfowl

Joined: 27 Jan 2005 Posts: 10102 Location: Bumf***, WA
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Posted: Mon Aug 31, 2009 2:32 pm Post subject: |
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I'm with Jim. First change the fuel filter. When you pull the old one out, you should be able to blow through it easily.
Also please add your location and put the year and model of your bike in your signature.
Welcome. _________________ 93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE |
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RobWheatley Flying Brick Rider

Joined: 06 Jun 2008 Posts: 261 Location: Chatham, Kent. UK
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Posted: Mon Aug 31, 2009 6:43 pm Post subject: |
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I had the same on my RS, did everything to sort it out and nothing worked, then one day i checked the plug to the motronic and found 1 pin was corroded, cleaned it up and hey presto... cured.
Rob _________________ 1999 K1100LTIC Smooth and Quiet Cruise, BFD & HID
1996 K1100RS. dead but not forgotten. |
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BigAndy121

Joined: 28 Aug 2009 Posts: 3 Location: UK
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Posted: Sat Sep 05, 2009 2:29 pm Post subject: Wiring Looking Dodgy |
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Hi took the tank off today and was presented with the following:
The plugs A,B,C and D were all as you see in pics, what are they and should they all be like this?
In this next pic rhere is yet another seemingly unneeded plug (2) anyone know what it is and should it be connected to anything.
There are also two wires (1) one brown and one red and white the brown one is bare at the end, this can`t be good, anyone help me with these.
Thanks in advance
Andy _________________ BMW K1100LTIC 93 |
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RobWheatley Flying Brick Rider

Joined: 06 Jun 2008 Posts: 261 Location: Chatham, Kent. UK
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Posted: Sat Sep 05, 2009 2:34 pm Post subject: |
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The extra plugs in the relay box are for things like alarms etc, wouldnt worry about them too much.
Not too sure about the others though, some might be from when it was converted back from an Ex Plod. Sure someone will come along with more info, If not where in the UK are you?
Rob _________________ 1999 K1100LTIC Smooth and Quiet Cruise, BFD & HID
1996 K1100RS. dead but not forgotten. |
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Mystic Red Flying Brick Rider

Joined: 28 Mar 2005 Posts: 2330 Location: Twin Lakes Idaho
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Posted: Sat Sep 05, 2009 4:08 pm Post subject: |
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Does 2 plug into your tank? _________________ Scott Hespelt, '94 K11LT
K11 OG #466 |
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Jim Site Admin

Joined: 17 May 2003 Posts: 3841 Location: WHERETHEFUNNEVERENDS
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Posted: Sat Sep 05, 2009 5:31 pm Post subject: |
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the brown wires are grounds. Do you not have the schematic? I think there's a link to it in the tech links thread. If not, someone here can email it to you. _________________ Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000
"We shall not all die, but we shall all be changed." |
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jpberens1994K1100RS Flying Brick Rider
Joined: 06 Apr 2008 Posts: 784 Location: Hales Corners, WI. / Relocating to central FL.
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Posted: Sun Sep 06, 2009 9:11 am Post subject: #2 |
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Just trying to help.
I have a 93 K1100RS
That #2 white plug looks like the connector for the guages. Are yours working?
When I was at the MOA national in TN, I got a short in my temp guage wire and that whole part of the harness got burned up. It of course tried to take everything with it.
I could have just bought wire and re-did that section, but I got a complete harnes from a wrecked bike pretty cheap and cut in what I needed. _________________ 1993 K1100RS that I'd rather be riding FAST!
2014 Moto Guzzi Norge |
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RobWheatley Flying Brick Rider

Joined: 06 Jun 2008 Posts: 261 Location: Chatham, Kent. UK
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Posted: Sun Sep 06, 2009 6:23 pm Post subject: |
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Guage connectors on my LT are green for temp and orange for fuel.
Rob _________________ 1999 K1100LTIC Smooth and Quiet Cruise, BFD & HID
1996 K1100RS. dead but not forgotten. |
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jpberens1994K1100RS Flying Brick Rider
Joined: 06 Apr 2008 Posts: 784 Location: Hales Corners, WI. / Relocating to central FL.
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Posted: Sun Sep 06, 2009 7:03 pm Post subject: guage harness |
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Yes green & orange, my 93 RS as well, but they then run together into a single harness culminating in a white plug which connects to the main harness.
Least on my RS it's that way. _________________ 1993 K1100RS that I'd rather be riding FAST!
2014 Moto Guzzi Norge |
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Flying Duck PsyKotic Waterfowl

Joined: 27 Jan 2005 Posts: 10102 Location: Bumf***, WA
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Posted: Tue Sep 08, 2009 4:14 pm Post subject: |
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I'd guess #2 is for one of the dash switches - aux lights?
The brown and red/white are most likely for a power socket. _________________ 93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE |
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tibbe Flying Brick Rider
Joined: 14 Jul 2003 Posts: 190 Location: Lulea Sweden
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Posted: Thu Sep 10, 2009 3:45 am Post subject: |
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Hi
Had some mysterious problem with f.ex. ABS on my -94LT.
Cleaned the ground connector to chassi ( close to the "2" with arrow on your second picture ) under the tank and as far I'v seen all are gone knock knock.
IMHO seen from the pics of your bike that it can have corrosion in electric. |
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slyderx Brick Rider
Joined: 03 Apr 2007 Posts: 36 Location: Tipperary Ireland
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Posted: Fri Sep 11, 2009 11:13 am Post subject: |
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check your exhaust for cracks..especially where the pipes meet..( wait until cold of course ) and run your hand around the bunched pipes. _________________ slyderx
K1100LT (1992)
ZRX1200R ( yummy) |
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