Difficult starting + rough running

[gpearson]

Hi all - just thought I'd plumb the collective wisdom here

2010 R1200GS adventure, recently had the 12k mile service from Steptoe and was running fantastic. This morning however, turned over fine but would not catch - until I gave it a touch of throttle. Ran rougher than usual, and in a quick shakedown ride seemed to be down on power and a lot more vibration. From what I can see it feels a lot like plug or more probably, ignition coil problems.
Going to disconnect the secondaries and see how it is, then repeat with primaries - but was wondering if there's anywhere else that ought to be worth taking a look at?

Cheers!

 

[(RIP) Miff]

Make sure the throttle cables haven't become unseated from where they split, and on the throttle bodies.

http://www.ukgser.com/forums/search.php?searchid=65385

 

[gpearson]

Thanks - ended up getting derailed with some house stuff, so will be getting into this tomorrow

 

[Bendy toy]

It could also be a failing coil. Check the header pipe temperatures the swap the primary coils left-right and see if the hot pipe moves over. Don't leave it too long. My failing coil cause that side to run VERY rich which ruined the O2 sensor with soot.

Before I get accused of catatrophising - check the simple things as Miff says, then rule out the potentially damaging stuff.

 

[gpearson]

Checked out the bowden cable box - main cable looked to be seated fine. I did adjust the handlebars right before this so it was certainly worth a look.
Going to pull secondary plugs on both sides, see if it will run - if not, one of the mains has to be going/gone - if not, repeat with secondaries. I've got a set of old plugs that were pulled at the 12k so if needed I'll switch those out to see if a plug has gone bad.

 

[(RIP) Miff]

There's a little black rubber plug on each throttle body. These are used for balancing the TBs. Check one hasn't been knocked off.

Sorry. I'm on the phone.

 

[gpearson]

I know the ones you mean - balanced the TB using those on my old GS - will check

 

[(RIP) Miff]

Just thinking of the cheapest/easiest things first..

Plus I noticed mine today when I was putting the bike away

 

[Pukmeister]

Try a TPS reset.


Sent from my iPhone using Tapatalk - now Free

 

[AWSBIKES]

Hi,

I have this exact issue and I've be informed by BMW that it is the secondary ignition coil.
However, Vines (Guildford) can't see me till 28th June!!!
Did you get to the bottom of your issue? I'm hoping to understand if this is simply a part that needs replacing.

Thanks,
Adam.