Resetting TPS - BMW Luxury Touring Community
 
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post #1 of 12 Old Jan 24th, 2015, 5:20 pm Thread Starter
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Resetting TPS

I had the battery disconnected on my K1300GT to attach some clearwater lights. When I reconnected the battery I did the TPS reset procedure like I did on my LT many times.. i.e. switch on the ignition (do not start engine), open and close the throttle 3 times, switch off ignition, switch ignition back on and start engine. After doing this the throttle response was obviously not in sync with throttle movement so I looked in the service manual for the procedure to reset the TPS in case it was different from the LT. I assume the TPS is what the manual refers to as the "throttle-valve potentiometer". It says it is not necessary to reset it because it is a "self-teaching system". Does anyone know how long it takes the computer to learn the correct throttle position. I have ridden it for over 100 miles since reconnecting the battery and it is still out of sync.

******

Al Strickland
Blairsville, Georgia
1967 Honda Cub
1972 Honda CB350
1979 Suzuki GS750E
2001 R1150GS (gone -- victim of a Highway 28 curve)
2002 K1200LT Trike (now history, transmission died)
2009 R1200GS
2013 K1600GTL
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2009 K1300GT
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post #2 of 12 Old Jan 25th, 2015, 7:06 am
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Re: Resetting TPS

Al I would think after the 100 miles you rode the GT it would be set. Also you did crank the throttle wide open while riding correct ?
My RTW reacts to the TPS reset, try it again . After the three full turns of the throttle start the bike do not turn off the key ,see if you get better results.

Pete Murray
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2014 RT
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2002 LT 171 K Gone
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post #3 of 12 Old Jan 25th, 2015, 8:08 am Thread Starter
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Re: Resetting TPS

I posted another post a few weeks ago about this but let me try to explain what the bike does and what I have tried to remedy it. First, I have ridden the bike a couple of thousand miles since buying it a few months ago. It now has 16000 miles on the odo. I don't remember it having the problem when I first got it -- it could have started after I disconnected the battery the first time. The bike accelerates great below 4000 rpm, but above that it hesitates or stumble on hard acceleration like when pulling through a curve. A BMW technician told me it could be caused by carbon build up if the previous owner had not ridden it regularly at high rpms. I have run 5 or 6 tanks of gas with fuel injector cleaner. No improvement. I read on this forum that a faulty O2 sensor could cause this. I replaced the O2 sensor. No improvement. I installed a booster plug. This did eliminate stalling at stop lights but did not correct the acceleration problem. I asked a BMW tech to look up computer updates for the bike. He said there has been none to deal with an acceleration problem. He said the stepper motor could be bad but said that would be very expensive to replace. I readjusted the play in the throttle cables to eliminate some of the slack. No improvement. I use ethanol free gas but I have tried E10 regular and premium. Is it possible the TPS is defective? I have never heard of a defective TPS. How about spark plugs? The originals are probably still in it. It doesn't have a fuel filter so that can't be the problem. Possibly would replacing the air filter help? I have had the battery disconnected a lot installing accessories but I don't think I will need to disconnect it anymore. Maybe I just need to wait and see if the problem fixes itself...

******

Al Strickland
Blairsville, Georgia
1967 Honda Cub
1972 Honda CB350
1979 Suzuki GS750E
2001 R1150GS (gone -- victim of a Highway 28 curve)
2002 K1200LT Trike (now history, transmission died)
2009 R1200GS
2013 K1600GTL
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post #4 of 12 Old Jan 25th, 2015, 11:30 am
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Re: Resetting TPS

I'm sure it's not a carbon issue the tech suggested ,due to the bike running well when you first got it.
The fuel pump does have a strainer not filter as you said. The strainer is very fine mesh could be restricted.
Canister is not saturated ? Do you here a vapor lock noise after riding and open gas cap ? Have the shop reflash the computer.. Will the bike pull strong with a roll on as oppose to wacking the throttle ? If so then possible fuel starvation due to canister plug creating vapor lock or fuel pump mesh clog. Hope this helps.

Pete Murray
IBA # 359 and
2014 RT
1973 R75/5
2002 LT 171 K Gone
2008 FJR 36 K Gone
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post #5 of 12 Old Jan 25th, 2015, 11:55 am
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Re: Resetting TPS

This sounds like the airbox problem others have described. There's a valve in the airbox that sticks after a while on pre-2008 GT's ( I think it was pre-2008, please don't take my word for it).
The dealer should recognize this if it's the case. I think the fix is an updated airbox, the valve is cast into it and can't be replaced.
Look for "airbox" threads on the other forums (K-bikes.com, iBMW.com) and on this forum as well.
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post #6 of 12 Old Jan 25th, 2015, 1:58 pm Thread Starter
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Re: Resetting TPS

Not the canister because I removed it, left the in tube open and plugged the out tube going to the recirculation valve. Shouldn't be the airbox because it's an 2009 model. When I get a chance I am going to pull the fuel pump and check the strainer.

******

Al Strickland
Blairsville, Georgia
1967 Honda Cub
1972 Honda CB350
1979 Suzuki GS750E
2001 R1150GS (gone -- victim of a Highway 28 curve)
2002 K1200LT Trike (now history, transmission died)
2009 R1200GS
2013 K1600GTL
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post #7 of 12 Old Jan 25th, 2015, 8:07 pm
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Re: Resetting TPS

Al
A little far fetched but those bikes did in fact have a stalling issue when coming to a stop. The cause and the fix was a throttle/ fuel mixture remapping. This fix was done in late 2009. Is it possible that the bike you have has never been updated? Just a shot in the dark.

Don Smith
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post #8 of 12 Old Jan 26th, 2015, 6:10 am Thread Starter
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Re: Resetting TPS

Quote:
Originally Posted by dasmith59 View Post
Al
A little far fetched but those bikes did in fact have a stalling issue when coming to a stop. The cause and the fix was a throttle/ fuel mixture remapping. This fix was done in late 2009. Is it possible that the bike you have has never been updated? Just a shot in the dark.

Don Smith
The bike did have the stalling problem but the booster plug stopped it. Maybe the software update wasn't done. I think my next move will be taking it in and have the latest update installed (or reinstalled).

******

Al Strickland
Blairsville, Georgia
1967 Honda Cub
1972 Honda CB350
1979 Suzuki GS750E
2001 R1150GS (gone -- victim of a Highway 28 curve)
2002 K1200LT Trike (now history, transmission died)
2009 R1200GS
2013 K1600GTL
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post #9 of 12 Old Jan 30th, 2015, 6:12 am Thread Starter
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Re: Resetting TPS

Update... I called service technician again and he said there has been no computer updates for the K13GT. He suggested that there might be a problem with the fuel pump. I checked it and the fuel pump is ok. No restriction on the intake screen. It holds pressure of 50 psi at all rpms and doesn't drop below 40 psi after being shut off for 30 minutes. I am going to put a new air filter on and see if that helps.

******

Al Strickland
Blairsville, Georgia
1967 Honda Cub
1972 Honda CB350
1979 Suzuki GS750E
2001 R1150GS (gone -- victim of a Highway 28 curve)
2002 K1200LT Trike (now history, transmission died)
2009 R1200GS
2013 K1600GTL
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post #10 of 12 Old Jan 30th, 2015, 9:10 am
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Re: Resetting TPS

Quote:
Originally Posted by alstrickland55 View Post
Update... I called service technician again and he said there has been no computer updates for the K13GT.
I hope he means since your last update as mine has a base load and an update from 2010. At least according to the GS-911 readout. I still have not gotten any word from my new dealer on the subject and I am not riding the bike either since my surgery. It will be last March before I am cleared to ride again.

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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post #11 of 12 Old Jan 30th, 2015, 1:18 pm Thread Starter
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Re: Resetting TPS

I guess it is time for me to find another dealer. This is the second time he has told me that there have not been any updates for the K13GT.

******

Al Strickland
Blairsville, Georgia
1967 Honda Cub
1972 Honda CB350
1979 Suzuki GS750E
2001 R1150GS (gone -- victim of a Highway 28 curve)
2002 K1200LT Trike (now history, transmission died)
2009 R1200GS
2013 K1600GTL
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post #12 of 12 Old Aug 23rd, 2015, 2:47 pm
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Re: Resetting TPS

Your 09 bike could still have the bad airbox. The new one did not come into use until after the second week of October in 2008 and there were 09 bikes made before that. In general the air box did not cause stumbling at mid range, fueling did. But you could also have a bad stick coil. They cause troubles like yours. Easier to find if they completely fail then you look for a cool exhaust header.

Beech
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