Gs911 experts help! 1200ADV rough running

haydw

haydw

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Just come back from Ireland on what feels like an over fueled bike, gone through 16 litres in 60 miles, bike wont idle and misfires.

Checked the plugs, they are covered in soot.

Plugged in a gs911, need help with the readings.Lambda seems to be ok, same either side on real time values they go up and down as they should.

TPS is reading 87% when throttle shut, goes to 100.1 on half throttle and wont go up any higher.

Think this is my fault, bike throwing in tons of fuel as tps says bike needs it, butterflys shut, bike stalls as over fuelled.

Should it read 0-100%?

Is it a straight swap or will I need the gs911 to reset all values?
 
Might be worth a TPS reset if you haven't done so already. Ignition on, slowly open throttle from fully closed to fully open three times, trhen ignition off.
 
Check real time TPS output values, should be zero to 100%.

Use GS911 to reset adaptive values.

Sounds like you have a faulty TPS or the lefthand butterfly shaft is sticking mechanically open. Also check throttle cable seating on LH throttle body and that the LH throttle cable isn't jammed inside the cable splitter beneath the fuel tank/in front of air box.

If you have an R1200 riding friend nearby, perhaps use their TPS on your bike for a quick test ride to prove/disprove ?
 
It first manifested itself as a slightly raised idle speed, reset itself when I turned the ignition off but the engine ran fine. Came to it next morning it misfired, refuses to idle and blows black smoke out of the back.

Have reset all adaptive values, same issue. Real time value reads 86% on closed throttle, 100% when half open and no more. Both cylinders are sooted up on checking the plugs.

Doesn't feel like a throttle valve is sticking but will check and look at the butterfly's as well. Am thinking TPS though as it was a sudden malfunction.
 
Mine badly sooted the lambda sensors when the coils were failing. My guess is unburnt fuel leaves free oxygen in exhaust so ECU adds more fuel making it even more rough running.
Black case coils are much less reliable than stainless case coils.
 
What did you do to the bike before this happened? Anything at all, no matter how miner? The reason I ask is that it sounds like one of your throttle cables is not properly seated. It is not that hard to unseat them. Look for something like this:

BowdenBoxcableout.jpg

BowdenBoxcableout2.jpg


Jim :cool:
 
Checked that Jim. I did have the tank off a month ago but have done 3000 miles since. Riding the bike as normal on Thursday, noticed that idle was up near 1800rpm but when I turned off and started again it seemed to resolve itself. Came to it the next day, it then cut out on idle, then the misfire started and wouldn't run below 2000rpm. Then started using fuel like a vicar drinking communion wine, and pulls fine when the throttle is wide open.
 
haydw said:
Checked that Jim. I did have the tank off a month ago but have done 3000 miles since. Riding the bike as normal on Thursday, noticed that idle was up near 1800rpm but when I turned off and started again it seemed to resolve itself. Came to it the next day, it then cut out on idle, then the misfire started and wouldn't run below 2000rpm. Then started using fuel like a vicar drinking communion wine, and pulls fine when the throttle is wide open.
Click to expand...
i had vaguely similar symptoms, other than the fuel consumption ie, wouldn't run below 2000rpm and ran fine at wide open throttle. My gs911 diagnosed that one of the idle stepper motors had zero value. Turned out to be that I had dislodged the connector from the stepper motor while cleaning the bike. Connected up and all was well. Not saying that your issue is as easy to remedy as that, but it sounds like a similar area.
Alan R
 
Looks like TPS.
Check injector pulse width in "real time values" At idle (0 TPS) should about 2.3 Ms.
At 85% TPS injector pulse width is around 12 Ms.
If you have reset the adaptations to remove a problem in the memory. Borrow a TPS and reset adaptations.
Would also change the engine oil after all that un-burnt fuel in the barrels.
It would have been working way outside the limits of the Lambda sensors, best to check them after TPS repair.
And the cat .....
 
My lambda sensors got badly sooted but were fine after the engine got new primary coils.
I'm NOT saying this idle issue IS coils but I am saying the sensors are pretty tough.
 
I'm seeing a lot of TPS problems now the bikes are getting older and racking up the miles.
 
TPS

I had a slight misfire around 3.5k, heavier on fuel, just not running right, long story short it was the TPS, which showed ok on GT1 and gs911.

nearly got rid of the bike coz of it but shes a monster now (after remap at hilltop).:green gri

the tps had 110k miles up it.
 
haydw said:
It first manifested itself as a slightly raised idle speed, reset itself when I turned the ignition off but the engine ran fine. Came to it next morning it misfired, refuses to idle and blows black smoke out of the back.

Have reset all adaptive values, same issue. Real time value reads 86% on closed throttle, 100% when half open and no more. Both cylinders are sooted up on checking the plugs.

Doesn't feel like a throttle valve is sticking but will check and look at the butterfly's as well. Am thinking TPS though as it was a sudden malfunction.
Click to expand...

The TPS definitely reads 0-100% in the GS-911 log. Something is wrong with your TPS or wiring. Swap in a know good TPS.
 
TPS changed, all adaptive values reset and sure enough, have a fully functional bike again. Blew loads of black smoke out to start with but that's a legacy of the original TPS fault. Its now cleared up. Prob will get some new plugs as they are sooted very badly and possibly an oil change, there has been a lot of unburnt petrol in the combustion chambers.
Sent from my Nokia 1020 using Tapatalk
 
Change the oil whilst you are at it. Fuel dilution causes camshaft scuffing.
 
Oil and filter change, plugs and if it still has a cat fitted it will probably be buggered by now, so perfect time to contemplate a decatt
 
Nippy Normans supply Touratech, Wunderlich, Desert Fox and many other makes of accessories.
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