09 GSA running rough.

[G5RJO]

My 09 GSA has 2000m on now and no issues until yesterday morning.

Hadn't been run for about a week due to bad roads (my KTM has better tyres for snow).

It was about -1c and the bike started okay after the usual low temp 3 or 4 prods on the starter. Pulled away and it felt a bit flat, not the usual desire to get up and go. It was running on both cylinders but didn't want to rev.

Symptoms were very much like carb icing, at one stage (after 3 or so miles)went to accelerate and......nothing , I could twist the grip to the max and it didn't respond, well maybe slowly. On the motorway once I had got it at 70 - 80 it seemed to drop speed on the hills where normaly it would just cruise up.

This didn't clear for about 50 miles and it was really sucking the fuel. I reckon it was using twice the normal level The range was falling at twice the rate the trip meter was climbing. It seemed to slowly clear and return to normal. Did nearly 300m overall, mostly fast motorway stuff at 85mph ish.

Only other thing was the bike had been washed before being parked up but that's about it. Fuel was fresh, had used 1/3 of a tank and it was fine, It ran on the same tank later and was again fine.

Water ingress? Anything obvious I've missed? Not really BMW wise yet so any pointers welcome.

Thanks,

Roger.

 

[Pukmeister]

Throttle position sensor may be either faulty or lost its setting.

To reset:

1)Turn on ignition, do NOT start engine.

2)Slowly twist throttle through full range of movement Open-Closed. Repeat 3 times.

3)Turn off ignition.

Turn on ignition and restart engine as normal.





Hope this helps.

 

[Pukmeister]

I forgot to add, the throttle position sensor (TPS) is fitted on the left hand throttle body by your left foot. It's purpose is to tell the fuel injection/igniton computer how far open the throttle is so it can add the correct amounts of fuel and advance/retard the spark timing accordingly.

Usually when power has been interrupted, the TPS reset routine should be performed for the ECU to 'relearn' the operating range of the throttle.

Maybe by washing the bike you caused a short circuit somewhere and the TPS setting was lost ? I'd suspect that maybe the cold start pulled so many amps that there was a temporary dip in power to the ECU?

Perhaps you could inspect the TPS wiring connector to make sure it is fitted and sealed correctly, or squirt a little WD40 on it just to be sure it is water free.

 

[Yellow Peril]

Apart from the obvious stuff in he owners handbook leave it alone and let BMW assist fix it thats what you paid for.

 

[GSmonkey]

Sounds like the secondary plugs - either plugs, leads or coils.

 

[Sgt Bilco]

Apart from the obvious stuff in he owners handbook leave it alone and let BMW assist fix it thats what you paid for.

Let BuMW take the strain here...it`s what warranty is for