Bike runs very bad after use of GS 911

[PeterKarel]

Hello All,

I was happy to have recived my GS 911 and of course I tried it on my
well running R1150RT Twin Spark version 2003.

No faults indicated, nice Realtime Values of course while the enginer
was running.

I tried the Hall Sensor Signal Test programm, no sucsess, just the
gray boxes on the screen, I I did the same with the next test called
Hall Sensor Setting, apparently I did not finish the tests well as
after these tests it was impossible to start the engine.
Therefore I had to reset the Motronic 4.2 by removing the fuse nr 5,
and in order to learn the Motronic the TPS setting I turned the gas
trottle twice.

After this restting the engine started again but big surprise:
The engine runs very raw and it will not accept rapid accelerations
anymore. It stalls like the ignition is not functionning anymore. At
the same time the rev counter is dropping from say 4000 rev to zero.
The moment I decellerate the trottle a bit, the engine takes up and
the rev counter indicates the revs again.

1st Question:
What exactly means the Prase:
Correct termination of this test subsequently cancels this state.
Remember to cycle the ignition after the test..
What do I have to do??

2nd Question:
Can the GS 911 put the Motronic in a non operating state, or leave the
Motronic in a kind of test modus?

These things happen when the weather is ideal for a nice ride!!!

All Help is very welcome!
Thanks
Peter

[Kendrick Pavey]

Peter

I've only had my GS911 2 days but from what I can glean from your note

1) Means the test needs to finish to cancel the test mode. Sounds like you didn't allow it to do this. Cycling the ignition is simply turning the key on, letting the bike do its normal checks and then keying off.

2) Don't know the answer for sure but your situation suggests it would seem so. The Hall Sensor I assume is detecting crank speed, if so it could explain your issue.

Sounds like you need Stephan's help here.

Cheers Kendrick

Hello All,

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Cheers
Kendrick Pavey
estee...@optusnet.com.au

[Stephan Thiel]

hi Peter,

answers inline...

On 7/31/10 1:31 AM, PeterKarel wrote:
> Hello All,
>
> I was happy to have recived my GS 911 and of course I tried it on my
> well running R1150RT Twin Spark version 2003.
>
> No faults indicated, nice Realtime Values of course while the enginer
> was running.
>
> I tried the Hall Sensor Signal Test programm, no sucsess, just the
> gray boxes on the screen,

Did you follow the instructions? The gray boxes depict the state of
each hall sensor... if you didn't crank the engine (by hand - don't hit
the starter button) then they will/can not change, as nothing is moving...

> I I did the same with the next test called
> Hall Sensor Setting, apparently I did not finish the tests well as
> after these tests it was impossible to start the engine.

Did you cycle the ignition as the procedure indicates? - even if you
terminate the procedure correctly, you still need to cycle the
ignition... All that happens here is that a command is issued that
disables the spark (as per the BMW procedure) and this is enabled again
as the last command of this procedure...

> Therefore I had to reset the Motronic 4.2 by removing the fuse nr 5,
> and in order to learn the Motronic the TPS setting I turned the gas
> trottle twice.
>
> After this restting the engine started again but big surprise:
> The engine runs very raw and it will not accept rapid accelerations
> anymore. It stalls like the ignition is not functionning anymore. At
> the same time the rev counter is dropping from say 4000 rev to zero.
> The moment I decellerate the trottle a bit, the engine takes up and
> the rev counter indicates the revs again.
>
> 1st Question:
> What exactly means the Prase:
> Correct termination of this test subsequently cancels this state.
> Remember to cycle the ignition after the test..

just before this we mention that this test will place the engine in a
state that it cannot start... and then the section you are asking follows..
"correct termination" means you've got to follow the procedure through
till it is done... not canceling it, not unplugging the diagnostic cable
before the procedure completes, not switching off the ignition before
you are told to do so...

> What do I have to do??

you just have to follow the steps

however, remember, if you have not followed the procedure correctly,
cycle the ignition and start that procedure again...

> 2nd Question:
> Can the GS 911 put the Motronic in a non operating state, or leave the
> Motronic in a kind of test modus?

as per the BMW procedure, these two functions disable the spark... this
is quite simple... there is a command.. "disable spark" and then at the
end we issue another command "re-enable spark"... other then that GS-911
is only reading realtime values.. for these functions..

The pulling of the fuse resets the adaptation values on those
controllers, hence it forgetting the state it's in and you having to
relearn the Throttle position etc... - there is a possibility that
something is a little more out of spec (due to ware etc.) and your
adaptive values (long term learned values) have compensated for that...

To make sure you have all the spark, you could let the engine idle and
pull the spark leads one at a time... - if you don't hear a difference,
then there is no spark on that one...

best,
Stephan

> These things happen when the weather is ideal for a nice ride!!!
>
> All Help is very welcome!
> Thanks
> Peter
>
>
>

--
========================
Stephan Thiel
www.hexcode.co.za
+27 21 880 1433 (tel)
0 86 614 1109 (fax)
========================

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