Sudden acceleration TC88B
Club Member
Joined: Oct 2008
Posts: 1,864
Likes: 3
From: Dallas, TX & Santa Fe, NM when I can find the time....
Since my experience level is being questioned let me just add that I am a member of HOG's Million Mile Club. I am 55 and have ridden since I was 11, Harleys since I was 15. The wrecked bike was a show bike that saw very little use, hence the low miles. I currently own 4 Harleys having just recently sold my Electra Glide Classic. Experience is NOT an issue here, this was mechanical or electronic failure that caused sudden, HARD acceleration at the worst possible time. The steep downhill threw me hard from a sideways position and dropped the bike on top of me breaking my right ankle, three ribs and one finger.
I was hoping to find some assistance here but apparently thats not the case.
I was hoping to find some assistance here but apparently thats not the case.
Sorry for your injuries and hope you heal up soon!
I'm no wrencher, but my guess is it has something to do with a mechanical failure as a result of the bike not being ridden much. I've seen numerous things fail just as much from lack of use than from over-use.
Road Master
Joined: Sep 2006
Posts: 824
Likes: 3
Sudden acceleration on a TC88 is almost an oxymoron.
Seriously, I had that happen once while pulling the front brake and inadvertantly increasing the throttle while downshifting into first. I'm more careful now.
Otherwise, a broken throttle return spring may have been the culprit, though you probably checked that after inspecting the crashed bike.
Seriously, I had that happen once while pulling the front brake and inadvertantly increasing the throttle while downshifting into first. I'm more careful now.
Otherwise, a broken throttle return spring may have been the culprit, though you probably checked that after inspecting the crashed bike.
Tourer
Joined: May 2010
Posts: 287
Likes: 0
From: charles town, wv
Also, in a very short search of this problem on the internet, it becomes obvious that most sudden acceleration problems are driver error. That may not be correct in your case, but there is a reason people STARTED with that.
Seasoned HDF Member
Joined: Jul 2007
Posts: 6,336
Likes: 67
From: SW Minnesota
Lot's of unnecessary harsh comments here.
Many computer controlled Harleys, slowing down with their throttles closed, will experience a surge in speed, lasting just a second or so. This has been well reported by various writers in magazines over the years.
Our Ultra did exactly that during it's first 5,000 miles. After doing the stage one download, it happens very seldom, but still happens. I would describe it as "loading up" on gas and suddenly accelerating. While having my bike in for service, I was given the opportunity to test drive a new Street Glide (an '08). Slowing down on an exit ramp, it suddenly accelerated almost to the point that I lost control and hit the far curb on the exit ramp. Yes, it happens, and it's not fun when it does so unexpectedly.
Many computer controlled Harleys, slowing down with their throttles closed, will experience a surge in speed, lasting just a second or so. This has been well reported by various writers in magazines over the years.
Our Ultra did exactly that during it's first 5,000 miles. After doing the stage one download, it happens very seldom, but still happens. I would describe it as "loading up" on gas and suddenly accelerating. While having my bike in for service, I was given the opportunity to test drive a new Street Glide (an '08). Slowing down on an exit ramp, it suddenly accelerated almost to the point that I lost control and hit the far curb on the exit ramp. Yes, it happens, and it's not fun when it does so unexpectedly.
Outstanding HDF Member
Joined: Jul 2010
Posts: 2,427
Likes: 2
From: Smack Dab in the Middle of Louisiana
I am looking for information on sudden acceleration issues related to the TC88B engine on my '04 FXSTSi. I just had the bike accelerate hard while in first gear on a downhill hairpin. Needless to say the resulting crash trashed my bike! Only 2260 miles on this bike and I am quite upset about it.
Does anyone out there have any experience or information on this situation? Thanks in advance.
Replies from Dumb Asses will be ignored!
Does anyone out there have any experience or information on this situation? Thanks in advance.
Replies from Dumb Asses will be ignored!
Sorry to hear of these types of accidents, I for one hope you are healing well considering the extent of bodily injury you stated that you sustained in the other post.
Seasoned HDF Member
Joined: Jul 2007
Posts: 6,336
Likes: 67
From: SW Minnesota
This problem has been discussed before on this forum. Note post 12 and 19 on this thread:
https://www.hdforums.com/forum/softa...l-for-efi.html
They describe what I've experienced.
https://www.hdforums.com/forum/softa...l-for-efi.html
They describe what I've experienced.
Last edited by MNPGRider; Aug 24, 2010 at 10:10 PM.
Big Kahuna HDF Member
Joined: Feb 2006
Posts: 23,881
Likes: 34
From: USA
Throttle cable sticking due to low mileage bike sitting...lube throttle cable with teflon lubricant. If it is an EFI bike and has 8 degree fuel injectors that might be a cause of surging.
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Elite HDF Member
Joined: Mar 2008
Posts: 3,906
Likes: 145
From: SE Louisiana
Would a stuck throttle cable cause acceleration?
