:icon_d enk:
still broke
Cruiser
Joined: Jan 2014
Posts: 164
Likes: 5
From: San Francisco
I had a similar problem. On my 02, the injector harness was tied to the frame with insufficient slack from the factory. This is a known problem on the early injected bikes. I don't know if it was also a problem with the MM injection, but what happens is the lack of slack results in the wire breaking WITHIN the shielding. My wiring had been replaced by the PO, so I thought it was fine, but I was at my wits end so I decided to replace it again, tying in further up the harness. As soon as I warmed up the wiring with the soldering iron, the shielding softened and I found exactly where it was broken. The injector harnesses on the 02 are a generic GM plug and are more cheaply found with that route as opposed to the HD branded ones. If you search my threads, you can probably read about my experience. Hope this helps.
Thread Starter
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Road Warrior
Joined: Jul 2011
Posts: 1,936
Likes: 310
From: coastal sc
I had a similar problem. On my 02, the injector harness was tied to the frame with insufficient slack from the factory. This is a known problem on the early injected bikes. I don't know if it was also a problem with the MM injection, but what happens is the lack of slack results in the wire breaking WITHIN the shielding. My wiring had been replaced by the PO, so I thought it was fine, but I was at my wits end so I decided to replace it again, tying in further up the harness. As soon as I warmed up the wiring with the soldering iron, the shielding softened and I found exactly where it was broken. The injector harnesses on the 02 are a generic GM plug and are more cheaply found with that route as opposed to the HD branded ones. If you search my threads, you can probably read about my experience. Hope this helps.
Cruiser
Joined: Jan 2014
Posts: 164
Likes: 5
From: San Francisco
Are you the original owner? Did you lift the tank to check? Like I said, the previous owner to me had make the fix and removed the zip tie, but they were still broken. I worked on it for almost a month before giving in and just going to replacing them for peace of mind.
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Road Warrior
Joined: Jul 2011
Posts: 1,936
Likes: 310
From: coastal sc
Are you the original owner? Did you lift the tank to check? Like I said, the previous owner to me had make the fix and removed the zip tie, but they were still broken. I worked on it for almost a month before giving in and just going to replacing them for peace of mind.
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Road Warrior
Joined: Nov 2014
Posts: 1,962
Likes: 140
From: NY
Got a timing light? Hook it up and go for a ride. Flash it at yourself and watch it as you get into the problem range. See if it changes or dies. Do this to both cylinders.
The assumption being followed so far is that it must be a fuel injection problem. This doesn't necessarily have to be the case. It can be ignition also.
The assumption being followed so far is that it must be a fuel injection problem. This doesn't necessarily have to be the case. It can be ignition also.
Good idea and with that in mind maybe when coil heats up ign to 1 cyl is cut off which your idea would catch.
Maybe bad plug wire too.
Could actually be a bad wire or connection at an injector or an injector that tested ok but when heated sticks / fails.
When cyl is lost could pull over the check ign to cyls with time light to verify ign is still present to both cyls .
Then is ign is ok to both cyls try giving the injectors a little smack with the handle of a screwdriver to see if 1 of them are stuck and freed when smaked/jolted making the dead cyl fire again.
If that doesnt work wiggle the wires to the injectors to see if the gets the dead cyl to fire to see if its an intermittent connection/wire issue.
But like OP said it's likely nothing too serious that just a pia to find because its intermittent .
Hope its not something like a bad lifter / cam & or clogged fuel filter limiting fuel flow enough to drop a cyl cruising at 60mph which would both be low on my list of possible causes in this case that are still possible causes.
Scott
Last edited by wscott; Aug 29, 2016 at 01:40 PM.
Road Master
Joined: Jun 2011
Posts: 836
Likes: 230
From: Deep South
Plug wires ..!!!
change the plug wires w/ a set from a known good running bike ......a bad wire will do the same thing ...