I recently purchased a stock 2006 Road Glide with 6k miles on it. The bike would stall and misfire occasionally so I took it to a dealer for check. The dealer suggested new plugs and a few tanks of fresh gas with Lucas injector cleaner added. Unfortunatly that didn't work. Reading this forum (which I just joined) I had my mechanic check intake manifold, fuel lines, fuel pressure, sensors, idle adjustment, etc. Things got a little better but the bike would still occasionally sputter and stall. I had it checked by another mechanic who said he thought it was running lean, removed one of the three stock muffler baffles and suggested a PC-3 to fine tune the air / fuel mixture. I finally found the M-1185 Injector bulletin, purchased OEM 25 degree injectors via the Internet and had dealer install and reflash my ECM. As I went to start the bike following the repair it cranked a long time before firing and when it finally turned over very strong odor of gas do much so that I thought it was leaking. No leaks however and the bike ran pretty good the 25 miles or so home from dealer. I did however notice again a hard start after having stopped for lunch on way home. I called dealer who suggested I bring it back for quick check. After letting bike sit for an hour or so I fired it up and headed back to dealer. On way there minimum 60 misfires and backfire. Bike ran so bad I wasn't sure I'd make it there. Mechanic who worked on it was baffled and threw up his hands and walked away. Needless to say I was a little dissappointed and left the bike there for further check where it sits this AM. They have subsequently installed PC-3 and adjusted it a little on the premis that the reduced back pressure in my pipe from removing one baffle could be the problem. Prior to this bike I had an 05 fuel injected dyna that I put 20k miles on. Bike didn't burp, sneeze, spit or misfire once in all that time. This owner is totally perplexed by the problem and am almost 1k into chasing it down. Can't imagine the PC-3 will make a difference as the bike is completely stock.

It does however seem to be running leaner with 25 deg injector than it did with the 8 deg injectors. This is opposite of what you would expect! Any suggestion would be enormously appreciated! t

 

If it's still taking a long time to start when you start cranking it look into the new injectors bleeding down. I had injectors replaced on a car for a recall. Had the same long cranking problem. The dealership claimed it was the fuel pump, but when I made them prove it to me we found that the pressure loss was on the injector side. New isn't always good.

Without being around the bike it's hard to diagnose, but the misfire sounds electrical. Start looking at grounds, wire connections, etc.

 

Jinks, thanks for reply! I have not yet test driven it since they added PC-3 so I'm hopeful that will solve it. If it works, I can only conclude I have bad ECM. If it doesn't work, we go back to basics and start with electrical system, coil, wires, etc.

 

Bigcat, I've subscribed to your thread. Please keep us updated. I'd be interested to see whether the PC-3 solves your problem.

Thanks.

 

A PC-III won't cure a bad ECM. I had that problem too. PC-III, K&N air cleaner, Suppertrap pipe. On a trip out west the bike would shut down at idle. Of course the dealer I took it to said they couldn't find a thing, so it must be the PC-III. Twenty miles up the road it was runnin' poorly, so I pulled the PC-III off & finished about 2500 miles of trip. Ran OK, but nothing to brag about. Got home & was planning to do something about the PC-III when it started stalling again. Took it to the selling dealer. They replaced the ECM & cured the problem. I reinstalled the PC-III & ran it till I changed to the Thundermax.

 

PM Hog doc

He is usually very helpful

**just thinking out loud**

I think a (going) bad crank sensor would give you hard starts, but wonder if it would cause back fires and misses. I would think it would

 

The 2006 model had a design problem with the wires going to the throttle body. A little to short. The vibration of the motor will eventually cause the wires to separate inside the insulation making it very difficult to find. A VOM meter will show continuity while in fact the wires may be barely touching. Attaching a VOM then flexing the wires may disclose the break.

 

Bruce00 & Rottnutz, thanks for reply! Bike started perfectly and idled fine prior to 25 deg injector install. Prior to injector install I would start up, let it warm for a minute or so then take off. Often when I'd go to throttle up it would sputter and misfire. Most often I could catch it with the throttle and recover. The problem seemed to work itself out after 30 minutes or so. But then occasionally it would still misfire and stall even after it was warm. When I first got the bike it was somewhat of a safety issue as it seemed to lunge occasionally as I would engine brake. Since then, with all the adjustments it's improved but isn't entirely resolved. Having that Dyna run so well I'm not inclined to settle for less with this one.

 

EasternSP, thanks for tip! The bike runs fine when throttling. It's in cruise, idle or low RPM that misfire is prevalent. I have plenty of power when in motion and crank throttle. t

 

Can't find Hog Doc in member listing?