I have a 2003 FLHRCI with about 6500 miles on it. Stage 1 air flow, Reinheart true duels, and a power commander. I have always had a problem with some backfiring on deceleration but no big deal the power commander seems to have gotten rid of most of the problem. The newest problem is that after a long ride I have noticed that my engine is starting to run rough. The dealer doesn't want to know anything about it becuse of the power commander. I have not been able to get it to do it when at the dealer either. Anyone had a problem like this?

 

All you can do is a systematic 'tune up' to locate the problem. Go through your manual to get a list of the tasks involved with a basic tune-up such as replacing the spark plugs, clean the air filter, clean or replace the fuel filter, etc, etc. But do one task at a time and test the bike. It may take a while to do the job but what does it matter - a few days - a task or two a day - no hurry. If you're like me, I work damned cheap for myself, and I'm not going to hurry for myself one bit.

BClem

BTW - I would consider your trouble a 'hot idle' problem.

 

Thanks Clem,
I have already tried changing the spark plugs with no help. I just had the 5000 mi service done but not sure if that covered the fuel filter, air filter, etc. but I will try your suggestions.

 

One thing come to mind.... When you say 'backfire' of any sort, that is a case of a lean burn condition. If I may suggest: do the manifold leak test just for grins. It takes only some brake clean or carb cleaner and a couple of minutes. Eliminate that possibility. The FI should NOT backfire on deceleration.....

BClem

 

I had a guy do that for me before the power commander and reinhearts. He used the carb cleaner and the rpm changed so I took it back to the dealer and they told me that you should never use a combustible fluid because it can be pulled into the intake. He used soapy water and there was no change in the rpms.

 

Oh Boy! The manual cites the use of carberator cleaner. The old manuals say to use gasoline!

These dealers can find 'real' mechanics, can't they!

BClem

 

My evo started cutting out when hot. It was frequent enough to be a concern, but not sufficiently predictable to have the dealership mechanic find it. Turned out to be the electronic timing sensor (on right side of engine case, under rivets). Solution is to rig cover plate for easy removal and carry a can of electricians refrigerent in your saddle bags. When you experience engine roughness, pull over to the curb, remove plate, and spray small amount refrigerent on sensor. If sensor is problem, roughness will instantly disappear.
Good luck