Rough Running - Cough Cough Cough - BMW Luxury Touring Community
 
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post #1 of 6 Old Sep 8th, 2008, 1:24 pm Thread Starter
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Location: St. Paul, MN, USA
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Rough Running - Cough Cough Cough

First of all thanks to all the folks who post valuable info on this site.

I changed the battery in my 2000 LT two months ago and did'nt
know to reset the throttle position sensor. The bike ran fine
for about a month. Then the mileage went down to approx.
32 and the bike now has a hesitation when starting out from a stop sign.

I started reading about oxygen sensors on the forum and learned about
resetting the throttle position sensor.

I pulled the bottom fuse for the Motronic and let it set over night.
I turned the key on (no start) and twisted the throttle twice, and then went for about a 2 mile ride down the road.

Now the bike coughs, sputters and will barely idle.
Does it take a number of key cycles for the computer to map
some of the air settings????

Any thoughts guys. I am thinking I need to get it in for a quick
computer scan to see if there are any codes.

Thank you.
Todd

'00 Blue K1200LT
'02 XR650L (sold)

Todd
Minnesota

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post #2 of 6 Old Sep 8th, 2008, 1:30 pm
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Location: kings mountain, NC, usa
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Re: Rough Running - Cough Cough Cough

1. charcoal canister, if it still has one, toss it.
2. fuel filter. when was it changed last?
3. spark plugs and wires, check them
4. are any vacuum or fuel lines pinched?
5. is the gas in the tank old?
6. do you get a vacuum noise when opening the fuel cap?

check all of the above, might help
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post #3 of 6 Old Sep 8th, 2008, 1:39 pm Thread Starter
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Re: Rough Running - Cough Cough Cough

The bike is new to me 9 months ago.
I rode it both thursday and friday before I did the TPS reset.
I have just been riding it.
I assume it still has the charcoal canister, I will check.
I would like to replace the plugs anyway.
I have been riding it, the gas is fresh.
I do not get a noise when I open the fuel cap.

'00 Blue K1200LT
'02 XR650L (sold)

Todd
Minnesota

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post #4 of 6 Old Sep 8th, 2008, 2:05 pm
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Location: Raleigh, NC, USA
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Re: Rough Running - Cough Cough Cough

My 99 had a engine hesitation from time to time with engine under 2000RPM. Sometime it was barely noticeable and sometime it was a real pain in the but. The Engine hesitation was a little bit more frequent with hot weather but could also happen with colder weather. Some day the bike would run fine with temp over 85 and sometime it would not. 2 month ago I disconnected the air box temp sensor and all sign of hesitation disappeared. The bike rode like a charm. Then I brought the bike to BMW for the 24k service maintenance and they plugged the air sensor back. Did not notice it for a couple of say until the throttle hesitation at low RPM came back. I finally installed a switch so I can connect the air temp sensor on (winter) and off (summer). The air temp is off right now and it makes a world of a difference. I will see if I need to put it back on for cold weather. May not be your problem but that is an easy thing to check
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post #5 of 6 Old Sep 8th, 2008, 2:19 pm
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Location: Tyler, TX, USA
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Re: Rough Running - Cough Cough Cough

Quote:
Originally Posted by MNTodd
First of all thanks to all the folks who post valuable info on this site.

I changed the battery in my 2000 LT two months ago and did'nt
know to reset the throttle position sensor. The bike ran fine
for about a month. Then the mileage went down to approx.
32 and the bike now has a hesitation when starting out from a stop sign.

I started reading about oxygen sensors on the forum and learned about
resetting the throttle position sensor.

I pulled the bottom fuse for the Motronic and let it set over night.
I turned the key on (no start) and twisted the throttle twice, and then went for about a 2 mile ride down the road.

Now the bike coughs, sputters and will barely idle.
Does it take a number of key cycles for the computer to map
some of the air settings????

Any thoughts guys. I am thinking I need to get it in for a quick
computer scan to see if there are any codes.

Thank you.
Todd
With that low of gas mileage, I would guess O2 sensor. Is there anyone around him that has a GS-911?

Ron


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747,891 miles on touring motorcycles since 1990

IBA 45658 MOA167437

2000 LTC 90,600 miles KIA (new)
2003 LTE 164,188 miles Silver (Purchased with 1687)
2008 R1200RT 176,196 miles (Purchased with 16458)
2017 R1200RT 96,669miles (new)
Total BMW miles 509,508
1982 GL1100 rode 84108 miles (bought with 12012 sold 96120)
1988 GL1500 rode 12067 miles (bought with 19893 totaled 31960)
1989 GL1500 rode 142208 miles (bought with 20302 sold 162510)
Goldwing miles 238,383
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post #6 of 6 Old Sep 8th, 2008, 8:52 pm
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Location: Knightstown, Indiana, USA
Posts: 14
Re: Rough Running - Cough Cough Cough

Sounds like the O2 sensor to me. I just replaced mine yesterday. Did alot of research and found that an exact match was used on the 99 540I. Bosch part #13475. Got mine at Autozone for $83.99. No wires to cut and splice.

Hope this helps!
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