How Common is a Bad ECM?
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Seasoned HDF Member
Joined: Jun 2006
Posts: 30,881
Likes: 32,991
From: King George, VA
How Common is a Bad ECM?
The ECM on my RG may have gone bad. The bike was progressively getting worse and worse during a recent trip into Kentucky until it was running on one cylinder and seemed to be out of time.
My mechanic has checked a lot of stuff on the bike and can't find anything else out of order. Now he is turning his attention to the ECM.
My mechanic has checked a lot of stuff on the bike and can't find anything else out of order. Now he is turning his attention to the ECM.
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
it is a computer and they can "just fail"
--- and one cause can be arc welding on a vehicle with the ecm in place...
( some may remember this happened to a BMW on "Long Way 'Round")
Mike
--- and one cause can be arc welding on a vehicle with the ecm in place...
( some may remember this happened to a BMW on "Long Way 'Round")
Mike
Road Warrior
Joined: Mar 2010
Posts: 1,422
Likes: 278
From: USA
2008 Road Glide, mine changed in 2008 on a road trip under warranty in Seattle area.
Seems like there is a pattern here with 2008 models, hmmmmmmm......
One thing I noticed after change is that my speedometer is spot on. Bike was going slower than what speedometer was reading with original one. Guess the software that was flashed into the new blank ECM at the dealer was better.
Seems like there is a pattern here with 2008 models, hmmmmmmm......
One thing I noticed after change is that my speedometer is spot on. Bike was going slower than what speedometer was reading with original one. Guess the software that was flashed into the new blank ECM at the dealer was better.
Seasoned HDF Member
Joined: Oct 2007
Posts: 56,052
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From: Western South Dakota
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Stellar HDF Member
Joined: Jun 2009
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From: Northern, Ohio (Yuck!)
It might just be corrosion on the ECM plug. Before you do anything expensive. Unplug the ECM spray both sides with contact cleaner and then use some di-electric grease before reassembling. For $10 this might fix your problems...