'00 K12LT misfire - BMW Luxury Touring Community
 
LinkBack Thread Tools Display Modes
post #1 of 30 Old May 20th, 2012, 3:44 pm Thread Starter
Senior Member
 
Scouter-50's Avatar
 
Join Date: Apr 2012
Location: Columbus, Texas, USA
Posts: 1,286
'00 K12LT misfire

OK, more on my ongoing saga with this bike. The miss seems mostly to be between 1000-2000 RPM at light throttle loads, it even pops back through the intake. If I give it a handful of throttle it runs fine up to about 7000 RPM where it misses again. The general consensus is plugs/wires. I'm only skeptical because the bike only has 10K miles on it now. Am I thinking wrong that 12 year old plugs go bad from age?

Thanks, for putting up with me guys,

Robert

They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
Benjamin Franklin (1706 - 1790)


2000 K1200LT "Latifah"
1994 R1100RSL (wife's)
1981 R80GS
1976 R90S
1965 R80/2 Frankenbike (wife's)
2001 Bunkhouse LX (given to son)
2011 Bunkhouse Queen

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Scouter-50 is offline  
Sponsored Links
Advertisement
 
post #2 of 30 Old May 20th, 2012, 5:25 pm
Senior Member
 
Join Date: May 2011
Location: Oshawa, Ontario, Canada
Posts: 978
Re: '00 K12LT misfire

seems to me you should just drive it, see if it settles down with some miles, sitting is generally not good for any motor vehicle - or you could start throwing money at it

Gary
2018 R1200RT
Past rides
2012 K1600GTL
2000 K1200LT
1992 K1100LT
2000 V Star 650/Velorex sidecar
1985 K100RT
1965 R60/2
1960 AJS 500 single
gary45 is online now  
post #3 of 30 Old May 20th, 2012, 5:57 pm
Junior Member
 
Join Date: Jun 2005
Location: , ,
Posts: 1
Re: '00 K12LT misfire

I had same issue with my '99 that sat for 2 years. I put in a new battery and started the engine. Once a tremendous amount of smoke cleared, I took the bike out for a test. Like your experience, there was a great deal of spitting and sputtering, especially when extra power was called for. I put some injector cleaner into the gas and ran the bike for about 20 miles in 3rd gear, occasionally revving up to near red line. The next morning I started out on a 1000 mile trip and was a little concerned about the misfire although is now was less frequent. 100 miles later, the misfire was gone and the bike pulled as when new. I have 60K on the clock, plugs are original, valves have never been adjusted, air cleaner was inspected, blown out and re-inserted. Only other maintenance has been oil, filter and rear-end oil changes. Bottom line: I theorize the plugs became oxidized while the bike sat, and good hard running took care of the problem.
larrydreed is offline  
 
post #4 of 30 Old May 21st, 2012, 5:57 am Thread Starter
Senior Member
 
Scouter-50's Avatar
 
Join Date: Apr 2012
Location: Columbus, Texas, USA
Posts: 1,286
Re: '00 K12LT misfire

Quote:
Originally Posted by larrydreed
I had same issue with my '99 that sat for 2 years. I put in a new battery and started the engine. Once a tremendous amount of smoke cleared, I took the bike out for a test. Like your experience, there was a great deal of spitting and sputtering, especially when extra power was called for. I put some injector cleaner into the gas and ran the bike for about 20 miles in 3rd gear, occasionally revving up to near red line. The next morning I started out on a 1000 mile trip and was a little concerned about the misfire although is now was less frequent. 100 miles later, the misfire was gone and the bike pulled as when new. I have 60K on the clock, plugs are original, valves have never been adjusted, air cleaner was inspected, blown out and re-inserted. Only other maintenance has been oil, filter and rear-end oil changes. Bottom line: I theorize the plugs became oxidized while the bike sat, and good hard running took care of the problem.
Thanks, Gary and Larry, I bought the bike in NY May 11 and put 1880 miles on it right away getting home to Texas. I now have over 2000 miles since I bought it. I am beginning to suspect some connector or another has corrosion/resistance in it. Any suggestions on which ones and where to look?

Robert

They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
Benjamin Franklin (1706 - 1790)


2000 K1200LT "Latifah"
1994 R1100RSL (wife's)
1981 R80GS
1976 R90S
1965 R80/2 Frankenbike (wife's)
2001 Bunkhouse LX (given to son)
2011 Bunkhouse Queen

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Scouter-50 is offline  
post #5 of 30 Old May 21st, 2012, 6:24 am
Senior Member
 
14wntr's Avatar
 
Join Date: May 2011
Location: Crystal Lake, IL, USA
Posts: 653
Re: '00 K12LT misfire

I would start with plugs and wires. The wires may be arcing against the head. Give them a very close inspection at least. I run NGK irridium plugs in mine, less money, and they last at least twice as long.

2000 K1200LT-C "Tsukune"
2013 Honda NC700X "Moka"

Kirk Johnson

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

President of
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
14wntr is offline  
post #6 of 30 Old May 21st, 2012, 10:09 am Thread Starter
Senior Member
 
Scouter-50's Avatar
 
Join Date: Apr 2012
Location: Columbus, Texas, USA
Posts: 1,286
Re: '00 K12LT misfire

Quote:
Originally Posted by 14wntr
I would start with plugs and wires. The wires may be arcing against the head. Give them a very close inspection at least. I run NGK irridium plugs in mine, less money, and they last at least twice as long.
Thanks, do you have a part #. I have a chance to get to a BMW dealer Wednesday before the tech day.

Robert

They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
Benjamin Franklin (1706 - 1790)


2000 K1200LT "Latifah"
1994 R1100RSL (wife's)
1981 R80GS
1976 R90S
1965 R80/2 Frankenbike (wife's)
2001 Bunkhouse LX (given to son)
2011 Bunkhouse Queen

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Scouter-50 is offline  
post #7 of 30 Old May 21st, 2012, 10:25 am
Member
 
Join Date: Jul 2002
Location: Apple Valley, MN, USA
Posts: 65
Re: '00 K12LT misfire

You might want to check or have someone check the pressure in the fuel rail for the injector system. Low or uneven pressure caused by a leak in the return hoses can show up as a slowly deteriorating condition like this. It can take over a year for it to finally quit running. Along the way you get burbles, poor gas mileage, slow starting and other odd symptoms that seem more like spark or bad gas problems. They might not be.
jimay is offline  
post #8 of 30 Old May 21st, 2012, 11:18 am
Senior Member
 
14wntr's Avatar
 
Join Date: May 2011
Location: Crystal Lake, IL, USA
Posts: 653
Re: '00 K12LT misfire

NGK DPR7EIX
Autolite 4163

2000 K1200LT-C "Tsukune"
2013 Honda NC700X "Moka"

Kirk Johnson

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

President of
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
14wntr is offline  
post #9 of 30 Old May 22nd, 2012, 3:04 am
Senior Member
 
bikerj's Avatar
 
Join Date: May 2011
Location: Garland
Posts: 1,078
Re: '00 K12LT misfire

Quote:
Originally Posted by Scouter-50
OK, more on my ongoing saga with this bike. The miss seems mostly to be between 1000-2000 RPM at light throttle loads, it even pops back through the intake. If I give it a handful of throttle it runs fine up to about 7000 RPM where it misses again. The general consensus is plugs/wires. I'm only skeptical because the bike only has 10K miles on it now. Am I thinking wrong that 12 year old plugs go bad from age?

Thanks, for putting up with me guys,

Robert
To answer your question re: old plugs, NO, they will not go bad strictly from age. If this were the case, brand new plugs sitting on someone's shelf in a parts store would have a shelf life, and eventually go bad, if not sold and used. This is not the case.

These people who suggest throwing parts at it don't know how to troubleshoot and/or don't have the right diagnostic equipment. Even if the spark plugs are original- w/ only 10K miles on them, I'd be hard pressed to believe it's the plugs unless the gap has changed some how, or there's a crack in the porcelain tower. Remove the plugs, inspect, clean, gap, checking for evidence of breakage or worn down electrodes. BTW, I'm going on the assumption the OEM plugs are what you have, whether original or replacements, which if replacements, would have even less than the 10K miles on them.

Jeff
Big D is my neck of the woods

99 K1200LT (don't need loud pipes w/ 8 spk. stereo)
08 HD wide glide
prior:
07 HD XL1200C (sold!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
)
78 KZ750 twin
76 CB750F
71 CL175 Scrambler
73? Yamaha 100 enduro

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by bikerj; May 22nd, 2012 at 5:43 am.
bikerj is offline  
post #10 of 30 Old May 22nd, 2012, 9:43 am
Senior Member
 
Join Date: May 2011
Location: Oshawa, Ontario, Canada
Posts: 978
Re: '00 K12LT misfire

you could pull plugs check for them all being same color and also ohm out plug wires - I had a miss in my K100 that turned out to be wrong resistance plug wire, new plug wire fixed problem, the plug wires on my K1100 were cracked badly with wire core visible but the bike ran perfect
I think plugs that have been in an engine for 10 years and run infrequently will age differently than those sitting new on the shelf - missing at an idle is a sign of a possible failing spark plug

Gary
2018 R1200RT
Past rides
2012 K1600GTL
2000 K1200LT
1992 K1100LT
2000 V Star 650/Velorex sidecar
1985 K100RT
1965 R60/2
1960 AJS 500 single
gary45 is online now  
post #11 of 30 Old May 22nd, 2012, 10:27 am Thread Starter
Senior Member
 
Scouter-50's Avatar
 
Join Date: Apr 2012
Location: Columbus, Texas, USA
Posts: 1,286
Re: '00 K12LT misfire

Quote:
Originally Posted by gary45
you could pull plugs check for them all being same color and also ohm out plug wires - I had a miss in my K100 that turned out to be wrong resistance plug wire, new plug wire fixed problem, the plug wires on my K1100 were cracked badly with wire core visible but the bike ran perfect
I think plugs that have been in an engine for 10 years and run infrequently will age differently than those sitting new on the shelf - missing at an idle is a sign of a possible failing spark plug
Thanks, Gary. I've got a good Fluke meter, what should I be reading for ohms? Also I used to think that misfiring usually occurred under high loads (pressure) in the combustion chamber. I have had plugs that would spark fine at atmospheric pressure but would not spark under compression. Am I mistaken? My miss is mostly in the 1000-2000 rpm range under light throttle. If I grab a hand full it runs fine.
Robert

They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
Benjamin Franklin (1706 - 1790)


2000 K1200LT "Latifah"
1994 R1100RSL (wife's)
1981 R80GS
1976 R90S
1965 R80/2 Frankenbike (wife's)
2001 Bunkhouse LX (given to son)
2011 Bunkhouse Queen

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Scouter-50 is offline  
post #12 of 30 Old May 22nd, 2012, 11:02 am
Senior Member
 
Join Date: May 2011
Location: Oshawa, Ontario, Canada
Posts: 978
Re: '00 K12LT misfire

agree about more pressure no spark but I have had plugs cause poor idling in my cars - the wires on the K100 and K1100 were 5 ohms - have not found any info re K12 wires but it's basically the same system so suspect they would be the same - if you measure all 4 they should be the same, if you have one that is different and that spark plug is a different color then that would be suspect - these plug wires are extremely expensive at least K100 ones are up here - 60 to 90 dollars each

have you had the engine redlined bouncing off the rev limiter - german engines seem to need that once in awhile (my experience anyways) - as others have said different animal over 6K revs

Gary
2018 R1200RT
Past rides
2012 K1600GTL
2000 K1200LT
1992 K1100LT
2000 V Star 650/Velorex sidecar
1985 K100RT
1965 R60/2
1960 AJS 500 single
gary45 is online now  
post #13 of 30 Old May 22nd, 2012, 11:19 am
Senior Member
 
bikerj's Avatar
 
Join Date: May 2011
Location: Garland
Posts: 1,078
Re: '00 K12LT misfire

Quote:
Originally Posted by Scouter-50
Thanks, Gary. I've got a good Fluke meter, what should I be reading for ohms? Also I used to think that misfiring usually occurred under high loads (pressure) in the combustion chamber. I have had plugs that would spark fine at atmospheric pressure but would not spark under compression. Am I mistaken? My miss is mostly in the 1000-2000 rpm range under light throttle. If I grab a hand full it runs fine.
Robert
Seems like the rule of thumb is approximately 1000 ohms per inch of length is acceptable. I would not necessarily discard a plug wire just because it's a couple thousand ohms difference from other wires. It's quite possible to have four wires w/ four different resistance values, especially if they're different lengths. A spark plug wire could be prone to have more resistance at higher temperatures, especially the cheaply made aftermarket ones.

Jeff
Big D is my neck of the woods

99 K1200LT (don't need loud pipes w/ 8 spk. stereo)
08 HD wide glide
prior:
07 HD XL1200C (sold!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
)
78 KZ750 twin
76 CB750F
71 CL175 Scrambler
73? Yamaha 100 enduro

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
bikerj is offline  
post #14 of 30 Old May 22nd, 2012, 2:32 pm
Senior Member
 
Join Date: May 2011
Location: Oshawa, Ontario, Canada
Posts: 978
Re: '00 K12LT misfire

Quote:
Originally Posted by bikerj
Seems like the rule of thumb is approximately 1000 ohms per inch of length is acceptable. I would not necessarily discard a plug wire just because it's a couple thousand ohms difference from other wires. It's quite possible to have four wires w/ four different resistance values, especially if they're different lengths. A spark plug wire could be prone to have more resistance at higher temperatures, especially the cheaply made aftermarket ones.

they have to be pretty close for the electronic ignition, I had 2 marginal wire on my K100 which caused a bad miss at idle - the wires are the same length - on the 2 valve engines if plugs got 2 thou out of tolerance they would not run properly- I could always tell when the gap got bigger - pulled set correctly, ran perfect

Gary
2018 R1200RT
Past rides
2012 K1600GTL
2000 K1200LT
1992 K1100LT
2000 V Star 650/Velorex sidecar
1985 K100RT
1965 R60/2
1960 AJS 500 single
gary45 is online now  
post #15 of 30 Old May 22nd, 2012, 6:51 pm
Senior Member
 
gpolakow's Avatar
 
Join Date: Jun 2007
Location: Fairfield, IA, USA
Posts: 1,369
Re: '00 K12LT misfire

Sorry, I'm coming in late to this discussion, but did you try running some Sea Foam through?

Greg
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


2000 k1200LT Basalt Grey (Roxie)
BMWMOA Number: 134717
I have a great doctor, if you can't afford the surgery, he'll touch up the xrays -- Henny Youngman

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
gpolakow is offline  
post #16 of 30 Old May 23rd, 2012, 4:37 am Thread Starter
Senior Member
 
Scouter-50's Avatar
 
Join Date: Apr 2012
Location: Columbus, Texas, USA
Posts: 1,286
Re: '00 K12LT misfire

Quote:
Originally Posted by gpolakow
Sorry, I'm coming in late to this discussion, but did you try running some Sea Foam through?
No, not really sure what Sea Foam is. I assume it's one of those snake oils like Lucas products that actually works. Could you identify the exact product and a possible place to purchase it?

Thanks, Robert.

They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
Benjamin Franklin (1706 - 1790)


2000 K1200LT "Latifah"
1994 R1100RSL (wife's)
1981 R80GS
1976 R90S
1965 R80/2 Frankenbike (wife's)
2001 Bunkhouse LX (given to son)
2011 Bunkhouse Queen

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Scouter-50 is offline  
post #17 of 30 Old May 23rd, 2012, 4:42 am
Gold Supporter
 
phydough's Avatar
 
Join Date: Jun 2007
Location: Niles, MI, USA
Posts: 275
Re: '00 K12LT misfire

http://www.seafoamsales.com/

Still -
Just a dog without a bone ~...............

CCR '09 Great trip!, 2010 Miles of smiles, 2011 Can this possibly get better? 2012 a Superior trip!

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

2004 K1200LT - ZZ Trailer
1983 R100
BMWMOA #158807 Michiana BMW Club #122
phydough is offline  
post #18 of 30 Old May 23rd, 2012, 5:15 am Thread Starter
Senior Member
 
Scouter-50's Avatar
 
Join Date: Apr 2012
Location: Columbus, Texas, USA
Posts: 1,286
Re: '00 K12LT misfire

Quote:
Originally Posted by phydough
Thanks, will pick some up at O'Reilly's today. Won't hurt to try it.
Robert

They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
Benjamin Franklin (1706 - 1790)


2000 K1200LT "Latifah"
1994 R1100RSL (wife's)
1981 R80GS
1976 R90S
1965 R80/2 Frankenbike (wife's)
2001 Bunkhouse LX (given to son)
2011 Bunkhouse Queen

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Scouter-50 is offline  
post #19 of 30 Old May 23rd, 2012, 7:05 am
Senior Member
 
sailor's Avatar
 
Join Date: Nov 2004
Location: Montreal ,QC , Canada
Posts: 1,166
Re: '00 K12LT misfire

Quote:
Originally Posted by Scouter-50
Thanks, Gary. I've got a good Fluke meter, what should I be reading for ohms? Also I used to think that misfiring usually occurred under high loads (pressure) in the combustion chamber. I have had plugs that would spark fine at atmospheric pressure but would not spark under compression. Am I mistaken? My miss is mostly in the 1000-2000 rpm range under light throttle. If I grab a hand full it runs fine.
Robert
For the spark-plugs wires, you should find a resistance of 6.3 to 6.5 K Ohms end-to-end (from coil end of the wire -to- the end of the cap).

They are made by BREMI or BERU for BMW and are generally marked with a resistance value. See 2 attached pictures - they are BREMI in this case - the wire is marked ONE (1) K Ohms and the cap is marked FIVE (5) K Ohms. Obviously this should add up to 6 K Ohms, but depending on the wire length, you will get a bit more for the longer wires.

NOTE: this will NOT measure external damage or cracks that could cause arcing in operation when hot. So checking the resistance does not tell the whole story...
Attached Thumbnails
Click image for larger version

Name:	K1200LT_Spark_plug_WIRE_CoilSide.jpg
Views:	172
Size:	76.6 KB
ID:	35290   Click image for larger version

Name:	K1200LT_Spark_plug_CAP.JPG
Views:	147
Size:	81.4 KB
ID:	35291  

-------------------------------------------------
John (Montreal, CANADA)
K1200RS (2002 IceBlue/Red - 96,000 miles)
-------------------------------------------------
Think twice before you hit [SUBMIT REPLY] - famous quote by another member:
"The value of this board is not founded on dismissing the ideas of others, but by posting to share our experiences and what we've learned from them."
sailor is online now  
post #20 of 30 Old May 23rd, 2012, 7:13 am Thread Starter
Senior Member
 
Scouter-50's Avatar
 
Join Date: Apr 2012
Location: Columbus, Texas, USA
Posts: 1,286
Re: '00 K12LT misfire

Quote:
Originally Posted by sailor
For the spark-plugs wires, you should find a resistance of 6.3 to 6.5 K Ohms end-to-end (from coil end of the wire -to- the end of the cap).

They are made by BREMI or BERU for BMW and are generally marked with a resistance value. See 2 attached pictures - they are BREMI in this case - the wire is marked ONE (1) K Ohms and the cap is marked FIVE (5) K Ohms. Obviously this should add up to 6 K Ohms, but depending on the wire length, you will get a bit more for the longer wires.

NOTE: this will NOT measure external damage or cracks that could cause arcing in operation when hot. So checking the resistance does not tell the whole story...
Thanks, John. This is exactly what I was looking for! I do not like throwing parts at something without proving the old part is bad. I am the senior HVAC tech at a small college in Texas and have to deal with co-workers that change parts because they don't know what is wrong. I'm slowly correcting this. Thanks again for your information.
Robert (a displaced Canadian from BC)

They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
Benjamin Franklin (1706 - 1790)


2000 K1200LT "Latifah"
1994 R1100RSL (wife's)
1981 R80GS
1976 R90S
1965 R80/2 Frankenbike (wife's)
2001 Bunkhouse LX (given to son)
2011 Bunkhouse Queen

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Scouter-50 is offline  
post #21 of 30 Old May 23rd, 2012, 8:20 am
Senior Member
 
Cochinosucio's Avatar
 
Join Date: Nov 2008
Location: Argyle, Texas, USA
Posts: 494
Re: '00 K12LT misfire

Quote:
Originally Posted by sailor

NOTE: this will NOT measure external damage or cracks that could cause arcing in operation when hot. So checking the resistance does not tell the whole story...
This was the most important point of that post, IMHO. The wires are at least twelve years old, and it's a common problem.
Seafoam works great, worth every penny.

"You can tell more about a person by what he says about others than you can by what others say about him."
Leo Aikman


Remember folks, street lights timed for 35 mph are also timed for 70 mph. ~Jim Samuels




Current Love
2001 K1200LT Champagne (Roxy)

Previous loves...
2000 K1200LT Canyon Red (Suzie Q)
1986 Honda Interceptor Black (Weezy)
1999 K1200LT Graphite (Grey Goose)
Cochinosucio is offline  
post #22 of 30 Old May 23rd, 2012, 5:29 pm Thread Starter
Senior Member
 
Scouter-50's Avatar
 
Join Date: Apr 2012
Location: Columbus, Texas, USA
Posts: 1,286
Re: '00 K12LT misfire

Quote:
Originally Posted by Cochinosucio
This was the most important point of that post, IMHO. The wires are at least twelve years old, and it's a common problem.
Seafoam works great, worth every penny.
Understood, I have good eyes and know what to look for. While I was at my nearest dealer today I mentioned to the service manager my bikes symptoms and he said "Disable the ambient air temperature sensor in the airbox." Can you guys enlighten me? I assume that this sensor is not connected to the trip/gas, etc. computer also. BTW, I did buy a can of Seafoam to try.
Thanks, Robert

They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
Benjamin Franklin (1706 - 1790)


2000 K1200LT "Latifah"
1994 R1100RSL (wife's)
1981 R80GS
1976 R90S
1965 R80/2 Frankenbike (wife's)
2001 Bunkhouse LX (given to son)
2011 Bunkhouse Queen

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by Scouter-50; May 23rd, 2012 at 5:37 pm.
Scouter-50 is offline  
post #23 of 30 Old May 8th, 2013, 6:40 pm
Member
 
Join Date: Dec 2012
Location: Newport & Sliema, , United States & Malta
Posts: 33
Re: '00 K12LT misfire

Hi Robert,
Did you ever get to the bottom of the misfire at low rpm?
I ve been working myself into a frenzy in trying to solve this issue as the only hiccup the bike has is literally the hesitation and hiccup at part/low throttle openings.
Just like your observations, at higher rpm it is not noticeable.

Cheers,
Al

2000 BMW K1200LT, 32K
1982 Suzuki GS 650G, 15K
1950 Douglas Mk4 Sport, 6,125 Miles,
1948 Douglas Mk3 Sport 1,813 Miles,
alexhallmalta is offline  
post #24 of 30 Old May 8th, 2013, 7:08 pm Thread Starter
Senior Member
 
Scouter-50's Avatar
 
Join Date: Apr 2012
Location: Columbus, Texas, USA
Posts: 1,286
Re: '00 K12LT misfire

Quote:
Originally Posted by alexhallmalta
Hi Robert,
Did you ever get to the bottom of the misfire at low rpm?
I ve been working myself into a frenzy in trying to solve this issue as the only hiccup the bike has is literally the hesitation and hiccup at part/low throttle openings.
Just like your observations, at higher rpm it is not noticeable.

Cheers,
Al
Alex, the low speed miss was cured by unplugging the airbox temperature sensor which changed the mapping in the "brain". I do now run nothing but premium fuel (which is crap in this country) to alleviate the chance of preignition since this engine has no "knock" sensor.
I have not had a problem in the last 4000 miles. What year is your bike? There are different methods to cure this problem depending on the year model.

Robert

They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
Benjamin Franklin (1706 - 1790)


2000 K1200LT "Latifah"
1994 R1100RSL (wife's)
1981 R80GS
1976 R90S
1965 R80/2 Frankenbike (wife's)
2001 Bunkhouse LX (given to son)
2011 Bunkhouse Queen

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Scouter-50 is offline  
post #25 of 30 Old May 8th, 2013, 7:18 pm
Member
 
Join Date: Dec 2012
Location: Newport & Sliema, , United States & Malta
Posts: 33
Re: '00 K12LT misfire

Rob, thanks for replying so promptly!
Its a 2000, with 32k.
Was just reading about disconnecting the sensor in the HoW.
The bike is great to handle even at low speed, but there is this constant feeling similar to a stuck throttle. Not enough when you need it and too much when you roll off the throttle. Removed the canister, new plug leads and plugs, but have yet to check the vacuum hoses on the throttle bodies.
Another noticeable issue is the ever so slight hunting at idle.
Will unplug the sensor tomorrow and report back.
Cheers,
Al

2000 BMW K1200LT, 32K
1982 Suzuki GS 650G, 15K
1950 Douglas Mk4 Sport, 6,125 Miles,
1948 Douglas Mk3 Sport 1,813 Miles,
alexhallmalta is offline  
post #26 of 30 Old May 9th, 2013, 4:01 am
Senior Member
 
AlaskaFish's Avatar
 
Join Date: Apr 2002
Location: Hillsboro, OR, USA
Posts: 3,136
Cool Re: '00 K12LT misfire

Al, the hunting at idle is a give away that you probably have a vacuum hose loose somewhere. If anyone has had their hand near the throttle bodies recently that is the most common area. If just one of those hoses is loose it will cause the idle to hunt up & down.

Good Luck!

John

John & Marilyn Fisher
'00 K1200LTC "Katie"
'95 Triumph "Tigger"
'12 Triumph 800XC "Tigger II" (RIP)
'12 Triumph 1200 Explorer "Shadow Tigger"
Hillsboro, Oregon

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
AlaskaFish is offline  
post #27 of 30 Old May 15th, 2013, 4:43 pm
Member
 
Join Date: Dec 2012
Location: Newport & Sliema, , United States & Malta
Posts: 33
Re: '00 K12LT misfire

Hi Guys,
Just a very heartfelt thank you for your input to the issues.
Finally removed the tank yesterday to get at the vacuum hoses on the throttle bodies. In the process, replace the air filter and coolant. Took the opportunity to see exactly where the air temp sensor is and unplugged it.
As for the vacuum hoses, they were all in place but very brittle and stiff. So I decided to remove all traces of the charcoal canister and plugged up the brass tubes on the throttle bodies with screw thread protector caps and a small amount of vacuum grease.
It all made a world of difference!
Many thanks,
Al
Attached Thumbnails
Click image for larger version

Name:	011.JPG
Views:	680
Size:	1.75 MB
ID:	38522  

2000 BMW K1200LT, 32K
1982 Suzuki GS 650G, 15K
1950 Douglas Mk4 Sport, 6,125 Miles,
1948 Douglas Mk3 Sport 1,813 Miles,
alexhallmalta is offline  
post #28 of 30 Old May 15th, 2013, 4:48 pm
Member
 
Join Date: Dec 2012
Location: Newport & Sliema, , United States & Malta
Posts: 33
Re: '00 K12LT misfire

The other photo......
Attached Thumbnails
Click image for larger version

Name:	010 resized.JPG
Views:	184
Size:	321.9 KB
ID:	38523  

2000 BMW K1200LT, 32K
1982 Suzuki GS 650G, 15K
1950 Douglas Mk4 Sport, 6,125 Miles,
1948 Douglas Mk3 Sport 1,813 Miles,
alexhallmalta is offline  
post #29 of 30 Old May 16th, 2013, 9:45 am
Member
 
Join Date: Dec 2002
Location: Glenwood, MD, USA
Posts: 72
Re: '00 K12LT misfire

Change the fuel filter.
afgrava is offline  
post #30 of 30 Old May 16th, 2013, 9:53 am
Member
 
Join Date: Dec 2002
Location: Glenwood, MD, USA
Posts: 72
Re: '00 K12LT misfire

Change the fuel filter.
afgrava is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the BMW Luxury Touring Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
K12LT Headlight Problem Eric109 K1200LT 10 Sep 24th, 2011 9:57 pm
DICE for K12LT. Spain j_carrillo iPod/MP3 6 Aug 31st, 2010 1:55 pm
Another new K12LT owner wa1200lt K1200LT 13 Apr 17th, 2009 1:53 am

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome