Very intermittant miss or surge
Posted: Tue Dec 24, 2019 12:41 am
Have a 2010 R1200RT purchased used with about 52K on the clock and now about 14 months later it has just over 64K. With colder weather in Chicago it was not ridden for 3-4 weeks with our Halloween freeze and when I took it out I noticed what I would call a very intermittent miss, possible surge under load or at times when just cruising along. It is usually just a quick little blip and can happen miles apart on highway or sometimes when accelerating. I haven’t ridden too much lately due to weather, but did ride last 2 weekends and was hoping I was just imagining it or maybe it would clear up with a new tank of fuel. What I did notice the last 2 times I fueled up is my gas mileage dropped from an average of 41-43MPG to 36MPG last 2 fuel stops. I have been staying in 4th gear a bit more on highway to experiment a bit but seems like a pretty good drop. I also noted a couple times there has been a slight and intermittent backfire on hard acceleration.
Based upon the dealer I purchased from, the spark plugs were replaced at 47K and valves were checked at 52K when oil was changed before I purchased. Not sue when throttle bodies were synced, so I had planed to do this over winter as well as take a look at plugs. Based on my reading, it seems like problem could be related to a bad stick coil but seems no easy way to test besides replace coils and recommendation is to replace all 4 at the same time.
In addition, I have always run premium fuel, 90% of time from top tier brands and added some Techron injector cleaner every couple of tanks. Of note, when stopping for fuel a couple weeks before this all started, the bike fell over on crash bar when kickstand was not fully locked and I was probably in a hurry - no damage besides some marks on my highway peg on that side and my pride.
I preparing to just take a chance with stick coils but checking if any other ideas before I throw parts at it as I’m used to diagnosing problems with cars and not just bolting on parts without solid data or testing failures point to a fix.
Based upon the dealer I purchased from, the spark plugs were replaced at 47K and valves were checked at 52K when oil was changed before I purchased. Not sue when throttle bodies were synced, so I had planed to do this over winter as well as take a look at plugs. Based on my reading, it seems like problem could be related to a bad stick coil but seems no easy way to test besides replace coils and recommendation is to replace all 4 at the same time.
In addition, I have always run premium fuel, 90% of time from top tier brands and added some Techron injector cleaner every couple of tanks. Of note, when stopping for fuel a couple weeks before this all started, the bike fell over on crash bar when kickstand was not fully locked and I was probably in a hurry - no damage besides some marks on my highway peg on that side and my pride.
I preparing to just take a chance with stick coils but checking if any other ideas before I throw parts at it as I’m used to diagnosing problems with cars and not just bolting on parts without solid data or testing failures point to a fix.