1996 Road King FLHRI (Fuel Injected).. we hit a real hot weekend here in Wisconsin (Mid 90's, near 100).. My Road King doesn't seem to like it. Yesterday while riding around it started to spurt and bog down a bit when I first left home.. then as the day went on it seemed to get worse. Went down to the lakefront, hit stop and go traffic, bike got hotter than I have ever seen it (220's).. After I stopped for a while and got back on, the engine started racing like I was twisting the throttle.. but I wasn't.. Had to kill the engine a few times, then it went away.. and seemed normal.. Went on the freeway for a bit, got off, and as I sat at the end of the offramp, my bike was idling really slowly, and if I tried to give it gas it would bog and almost kill.. I let it sit for like 30 seconds idling, revved it, and it seemed to go. Later, I got on again, and it started but started the engine racing thing again, killed it, restarted it, and then it started bogging down! Took the freeway home, it was much cooler inland, and the bike seemed fine with the cooler weather.. ran fine the whole way home.

Anyone got any ideas here? Last year my bike has spurting and bogging problems, and wouldn't start when it got hot.. the dealer replaced Cam Position Sensor and it seemed to fix it.. It seems to me like some sort of sensor isn't properly adjusting mixtures or something to adjust for the different temps.. but I don't know, I'm no mechanic! Anyone got any ideas here on what it could be?

Now, I need to have full disclosure.. I did install a 2 Wheel Tunes radio on my bike before this started happening, and I spliced into the accessory connector to power it. I can't see how this would cause this issue, but its possible.. But even when I turn the radio off (Via accessories switch on forks), it still has issues, so I don't THINK that would be it, but I suppose I could have screwed something up there. While connecting the radio I did disconnect a lot of the wiring harnesses searching for a specific connector that the instructions said to use.. so that also could have screwed something up..

Advice appreciated... I leave for Sturgis in a couple weeks need to get this resolved before then!

 

.same problem 04 roadking
efi ? look at throtle body
tps is out of wack because of broken rod on what i call the buterfly
ps . on scan all sensors check as ok
but you should have a .08 but might see a .68 or so on high idle
dont no about when the idle drops

 

Crimson.........

Does it just rev up and stay there for a minute, then go back to normal?

Does black smoke come out the exhaust when you try to twist the throttle while it's doing this?

My '96 Road King EFI did this same exact thing, and it ended up being the Cylinder Head Temperature Sensor. It is located in the front cylinder head, down in the opening in the middle. It is a $100 sensor, and can be changed out in like 15 minutes right at home.

What happens is the sensor goes bad and gives off improper ohm readings to the ECM. The ECM sees these ohm readings and translates them into a temp. rating. So what is happening is that the ohm reading is thru the roof, the ECM sees this as a super cold temp. reading, and increases the fuel to the motor and rpms to make up for this.

I replaced mine and the bike ran perfect until I sold it.

Good Luck,

Steve

 

Thats actually exactly what it was.. and yes, I had the same symptoms.. I had the dealer replace it.. cost me $275.00 including parts and their time.. if I had known it was easy I would have probably tried to put it in..