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Offline redcap0006

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No revs, no throttle, then okay
« on: November 27, 2015, 11:05:30 am »
Long story short
While making progress on TTSE and in the process of an overtake, I throttled up and nothing. Dropped a gear and confirmed, no throttle.

Pulled over safely to hard shoulder.  Bike is ticking over, all electrics are on but bike engine will not rev on throttle.

A minute or so later throttle response returns.  Journey completed.  Has happened a few times in eight days of commuting in last two weeks.  Refueled at different petrol stations to rule out bad fuel. 

Thinking dirty petrol, air mix, fuel pump, but really no clues other than lost throttle response.  Weather each time was between damp and very heavy rain. Satnav and grips both turned on.

31000 km on odo 2013 bike. Not overdue service

Booked in tomorrow to have diagnostics run...

Any similar problem out there, ideas as to what it could be? minor or serious?
Regards
Gary


Offline Phil

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Re: No revs, no throttle, then okay
« Reply #1 on: November 27, 2015, 11:35:42 am »
I think it happened to me this week but the other way round.   Catching up on a car in front and realising there was no overtake opportunity I rolled off the throttle.  Nothing.  The bike did not slow but continued at about 40 mph.    I looked down to make sure I was not in cruise control, but I was only in third gear so cruise control would not have been engaged.  Pulled in the clutch and the revs jumped to about 6k.  Changed down a gear and released the clutch to no avail, the bike was still travelling at the same speed.  Pulled in the clutch again and drifted to the verge with the engine over revving.  Eventually stopped and hit the kill switch.  Waited a moment to gather my thoughts, wondered if my glove had snagged the twist grip.  Restarted the engine which settled at a usual 800 revs.  Throttled up to 2k and released the twist grip which sprang back to its normal neutral position but the revs continued at about 2000.  Cut and restarted the engine a couple of times and eventually the throttle seemed to work ok.      Set off again , a little tentative and everything was back to normal.  No trouble  since. 

I'll speak to the dealer next time I'm in there.

Offline DaMonk45

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Re: No revs, no throttle, then okay
« Reply #2 on: November 27, 2015, 12:41:31 pm »
Connector, or bad wire.
I would start with All the connectors.

Offline redcap0006

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Re: No revs, no throttle, then okay
« Reply #3 on: November 27, 2015, 04:25:32 pm »
Hope its as simple a fix as a connector. Going ahead with diagnostics, could well be the damp and a connection or two.
Gary

Offline janfmiller

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Re: No revs, no throttle, then okay
« Reply #4 on: November 27, 2015, 04:59:40 pm »
Sounds like it would be a good idea to get your bikes to a dealer and have the error codes read.  No throttle is bad.  Stuck high RPM throttle is very very bad...

I have some friends with later-model Harley-Davidson's and they have a problem with the throttle by wire ceasing to work, has happened to two friends of mine on a few occassions.  Dealer could not help much, no codes stored.  "Cleaning the connector" was suggested and done, and I know one of them has not had this happen again.

If you do find a resolution, please post here.

Also, this sounds like it might have something to do with the early ECU problems where the ECU was subject to radio interferance and was replaced under recall.

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Offline Coconut

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Re: No revs, no throttle, then okay
« Reply #5 on: November 28, 2015, 07:56:43 am »
Could be several things - the first place I would start
would be to see if there are any DTC's ( Diagnostic Trouble Codes ) stored.

It's easy to display these on your Instrument Panel -

See here for instructions and a downloadable document listing the Codes and their meanings :

Servicing Data, Reference Info. & DTC ( Fault ) Codes

Cheers  :821:


 

Offline redcap0006

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Re: No revs, no throttle, then okay
« Reply #6 on: November 28, 2015, 03:43:32 pm »
Thanks Coconut,
had already left for dealers when you posted your last informative Post

So, I am back from dealers, on TTSE which is great.
A little embarrassed, but have learned something new today.

If anyone has the following problem, which I had, the answer in my case if below.

When I throttled up to overtake a few times over the last two weeks, the bike sometimes lost revs, ticked over with no throttle response for various short length of time.

Dealer "Did you switch off the bike and restart it". Me "no, afraid it would not restart"

Dealer, "okay we will check it out"


Technician findings
"rear brake pedal seized. On the TTSE when brakes are applied, revs drop"

I have to say that I wheel the bike backwards out of my garage every morning so I take the "seized" with a pinch of salt, more sticks in depressed position occasionally.

Moral of the story, service brake pedal and make sure it rises fully after use.

Hopefully the end of losing power in my case
Gary

Offline dsinned

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Re: No revs, no throttle, then okay
« Reply #7 on: November 28, 2015, 06:06:20 pm »
Like JanFmiller said, this could be related to the ECU recall a few years back.
Original owner of 2014 Lunar Silver Trophy SE, and 2015 Custom Silver & Black Bonneville T100.

 



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