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7 Posts
Did you do the 18K service at 36,000? If not, change all plugs. Also do the rest of the service and give the rad a good thorough clean inside and out. Look for the fouled spark plug. If you have a bad coil, the cylinder with the fouled plug is the one with the bad coil. If you did the 18,000 mile service, keet riding until your engine light goes on. Coils can work intermittently. It is rare that during a failure, you won’t get an engine light or a code thrown. If your situation is intermittent, at one fail or another, you will get the light and the code maybe not every time but sometimes. If you never get either, the vast likelihood is that you have a problem other than a bad coil-maybe a fouled injector or bad gas. Try injector cleaner and octane boost before you rip your bike apart for nothing.
 

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2013 GTL
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1,675 Posts
I don't have in-depth knowledge of the BMW's ECU, but on some auto's I know that there's a count threshold it needs to exceed in a set time for a code to be triggered.
 

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Mr.Fix It
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9,110 Posts
Update: I bought my lift, assembled it, and put the bike on it. I scanned for codes ( finally ) and found no discernable engine faults. So cleared all codes and reset the service flag (as I needed to anyway). The service light (white) is cleared and the bike fired right up.

BUT; I know what I felt and I felt a cylinder bog down. The bogging was intermittent and would alternate between correctly running and bogged in an instant. Coils. But no engine code? If the plug was the problem, the engine may not detect that, yes? The plugs have 40k on them. Do plugs pop in and out of working?

Advice por favor: @Gunnert @Prince
I wouldn't anticipate a bad plug. @ 40k miles they're still good. I changed plugs @ 50K and they were fine. Odds are it's a coil going bad, but which one? Without it throwing a code its a WAG. I'd suggest waiting until it either throws a code (engine trouble light on) or the motor starts to miss ALL the time. If it's missing (no code) your only option is to try using an infrared heat gun to identify which cylinder is 'missing'. I wouldn't expect to be able to read "bad cylinder" via checking a spark plug if it's only missing every now and then.

Duane
 

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48 Posts
To anyone contemplating a lift table if at all possible recess it flush into the floor. It remains there permanetly and you can do whatever you want over top of it and it is never in your way. It costs a few bucks extra in time and material but well worth the effort.
 

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26 Posts
I have a 2012 GTL that had an intermittent running issue. It happened after getting some fuel at a station that I don’t think sells much premium. At times it would under hard loads or accelerations it would act like it was missing and would cause it to shutter but then would suddenly clear up and rev to redline with no issue. I first added some injector cleaner thinking it might be a fuel issue even trying to see if by running it completely out of fuel would clear up the issue. All the time I was dealing with the problem that would come and go the bike never gave me an engine code. At the same time I had an issue with the sprag clutch for the starter that caused occasional starting problem to happen that progressively got worse. Knowing that I was going to have to have the sprag gear assembly replaced I decided that I would have the spark plugs changed and a service inspection done at the same time. This was done at 35000 miles on the bike and the dealer was going to keep it over the winter. Shortly after they picked it up I receive a letter from the dealer telling me that they were no longer going to be in business and that they would do the work and store the bike until April. Then receive the recall notice for the bad fuel pump problems from BMW after that dealer had closed shop so they would not be able to do the pump replacement. They had done the starter sprag gear replacement and service work and stored it until April. I decided that I would pick it up with my trailer and keep it in my trailer until a different dealer could get the replacement fuel pump for the recall. This took more time than I had hoped for because I didn’t receive a call from the that dealer informing me a pump had found its way to them until November of 2021. By now It had been sitting in my enclosed trailer since April 2021 I decided because it was winter I would take in this April 2022 to have the pump replaced. I have now been riding it since the pump was replaced and it hasn’t run this well since I bought it. I’m not sure because if it was that sat for a year completely out of fuel or the replacement of the spark plugs or the new fuel pump but one of those seemed to have fixed the problem.
 
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