I have a 1989 FLHTC which i've owned since brand new.I'm having a problem with it cutting out like it's out of fuel when it warms up after riding for 10-12 miles. It will die out then come back on then die and so on. It starts fine and even when i pull over when i have this problem and shut it off it stars fine.I will start riding again it will do the same thing.It's getting fuel.Any body have any thoughts on this.Can a bad ICM produce these symptons.

 

It can but they usually need to cool down before they restart.

 

Another possibility is the ignition sender in the timing cone, which failed on my bike, many years ago. Can be a challenge diagnosing what the exact problem is. There are some tests we can do in section 8 of the service manual, which may help.

 

I had a similar problem with my bike a few months ago.
It would die but would restart just fine.

Turned out it was just loose battery cables.

 

Well i know that my battery and the connections are good. I checked my chargeing system and it's all good.It's just perplexing. I do have a lot of miles on it, i'm the original owner. I'm getting fuel so i don't think that's the problem.

 

I had a similar problem that ended up being a dirty and slightly loose positive battery connection.

Is your ignition switch original? I also had a similar problem with my original switch that cleared up after replacing the switch and cleaning the connectors.

 

Also check the wire under the cone from the ignition pickup. It flexes with the motor vibrating in the motor mounts and will break inside the insulation. If you grab the wire and tug, you might be able to feel it broken inside. It would also probably kill the motor if you did that with it running.

I chased that problem for a couple years. The bike would die while out on the freeway at 70. I'd coast to the shoulder and it would come back and I'd ride on. Finally, it died and didn't come back around Cyprus Fairbanks, TX, if I recall, and I coasted to a hotel parking lot. I took Dr.Linda's Sporty home, came back with the Truck and finally could diagnose it.

 

Clogged fuel filter or the in tank filter
Tank not venting correctly

 

I've seen ignition switches do something similar,but it happened @ random.Pull over,turn ignition off,turn it back on and it would start.

 

Hey i just went through this w/ my '87 FLHTC. I could ride for 10-15 minutes - just long enough to make me think the problem was fixed after trying several things - but then it would start.

I am blessed to have an old school mechanic who pretty juch diagnosed it over the phone. My bike had the old points and condenser set up and he replaced it with an electronic ignition and the thing runs like a mad man. It was a well spent $400.

I am not sure if your bike still came w/ points and condenser but if so I hope you have the coin to get this done.