Interesting

So I am out riding on my 1200 DCT and am running in manual mode.

I was following 2 Ducati riders and they were making me a little nervous by crossing the lane markers on corners, etc.

When a passing opportunity presented itself I nailed it and bumped the Rev Limiter a little.

then I had to negotiate a 90 Degree right turn.

When I accelerated out of the turn the bike bogged and sounded loud and hollow.

I pulled over and noticed a burning smell and a pitch change.

No DTC on dash.

Babied the bike back home.

Along with the bogging, stuttering, burning smell, I had low fuel mileage and strange shift patterns in both D and S modes.

I pulled the Battery power for 15 minutes and ran the bike through a couple of fan cycles to no avail.

Brought the bike to John @ Mountain Motorsports on Ontario, CA.

He contacted Honda who had him reset the ECU to no avail.

He then started some trouble shooting of his own.

They found that the left rear spark plug coil connector must have not been fully on from the factory and when I bumped the rev limiter it must have loosened it enough to not fire the cylinder.

Hence the power loss, confused ECU, smell from the exhaust, low fuel mileage.

They checked cylinder pressures, etc and everything was normal.

Picked the bike up and it runs a LOT better than when it thought it was a three cylinder triumph.

Just thought the anomolie was interesting and you would think it would throw some kind of code when not running on all four.

 

It absolutely should have thrown a code for a cylinder misfire. Maybe the dealer just didn't think to look for one?

 

Nope. No code relating to misfire.. Only stored codes were 34-2 EGCV POT Voltage high, 35-1 EGCV Servo motor failure, 09-2 Clutch line EOP sensor voltage high. No current DTC's. The first two were due to installing a TBR muffler. Nothing pointed to a cylinder misfire.The bike runs great and plugging in the coil did the trick. Weird!!!

 

I guess I've been in the car world too long. Every car sold in America has had cylinder misfire codes since 1996 (OBD-II), but I checked the VFR service manual and there are in fact no trouble codes for cylinder misfire. That's almost unbelievable to me. Glad they found the problem for you just the same.

 

I too have found the ECU and ammount of trouble codes listed for my 03 to be somewhat rudimentary. Of course, sometimes simpler is better too.