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CVO Technical => Twin Cam => Topic started by: ragrep on June 12, 2009, 12:45:56 PM
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Riding last evening the EITMS was cycling on frequently while I was in stop and go traffic. I am having some issues getting it to cycle off with out stalling the motor. I've been giving the throttle a little "nudge" or "blip" but half the time it still stalls. Last night it stalled- the exhaust then shot back through the carb and a nice puff of black smoke shot out of my air cleaner- that looked pretty impressive to the 20 or 30 biker on lookers as I parked my bike. Im sure that couldn't have been a good thing for my valve train or crank right?
1. Is the EITMS a comfort feature or an engine protection feature? I read this on the Harley-Davidson forum:
During hot idle, or when the motorcycle is off-throttle and running at hot temperatures, EITMS shuts off fuel to the engine’s rear cylinder, leaving it to idle on the front cylinder only. Without combustion, the rear cylinder and exhaust header will begin to cool, bringing relief to the rider (and passenger) soon after. Once the rear cylinder cools to a predetermined temperature, or as soon as the rider accelerates, both cylinders resume operation. And by maintaining constant rpm during rear cylinder “shutdown,” transitions between one and two cylinder operation are nearly seamless. EITMS is purely for rider comfort. When it activates and “shuts off” the rear cylinder, it’s not because the motor is overheating. It’s designed to reduce the heat radiating from the rear cylinder to the rider.
This sounds a little like service rep lingo.
2. Are there any instructions how accelerate when the cylinder is cut off? I have yet to find any info in the owners manual on how to properly roll on the throttle when the rear cylinder is cut off. Its pretty touchy on my bike, and not knowing if its going to stall in traffic, is not part of the riding experience I signed up for. I think it can put the rider in a dangerous situation.
3. Turning it off- will doing so affect warranty?
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Im sure that couldn't have been a good thing for my valve train or crank right?
(...)
If it happens only very infrequently, it is not to worry about.
1. Is the EITMS a comfort feature or an engine protection feature? I read this on the Harley-Davidson forum: This sounds a little like service rep lingo.
It is to protect the engine from overheating in stop-and-go. There is additional benefit for the rider and passenger, because if it gets really hot, it get also uncomfortable, right?
2. Are there any instructions how accelerate when the cylinder is cut off? I have yet to find any info in the owners manual on how to properly roll on the throttle when the rear cylinder is cut off. Its pretty touchy on my bike, and not knowing if its going to stall in traffic, is not part of the riding experience I signed up for. I think it can put the rider in a dangerous situation.
There is nothing else to do than accelerating. The situation you seem to describe should have less to do with EITMS having kicked in, but it sounds like the familiar hesitation many 110" CVO's do have. If you are using a tuning device (like the Super SERT or PC V), the hesitation can be removed. If you are not using such a device, the tech at your dealer may have a newer stock map to load into your bike EFI, which also heals the condition.
3. Turning it off- will doing so affect warranty?
I don't think so. Since you can turn it on and off by yourself.
Ride safely,
Louis
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Ragerep had dealer turn mine off so I no longer had to worry about it. I had it turn on 3 times and wouldn't disengage and I got tired of messing with it. They turned it off for no charge as well. I could have turned it off with the TTS, but chose to have them do it since I was already on the road when it happened.
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You can toggle it off, but the root cause is still there. Get a custom tune using a device such as the TTS mastertune or SEST.
By raising the CLB number all idle and closed loop areas will be slightly richened and help. A cam change helps even more.
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Thanks- I am going to just shut the feature off- it's been more trouble than its worth.
Dewey-I have a PC5 and I had a fairly extensive tune after the 2" baffle install bike runs great overall- until it goes to into EITMS. I don't have the SEST or TTS, and since in the PC5 there is no parameter to adjust the CLB directly, how to accomplish similar results another way by either adjusting adding fuel or adjusting timing ? Richen it at 750 to 1200 rpm @ 0-10-20% throttle position..? , adj timing ect. For sure I will to talk to my tuner, but having some direction will help me explain to him where we need to adjust.
Agreed I do see the need for cams, but Im not ready to go there yet.
thanks
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Ragerep had dealer turn mine off so I no longer had to worry about it. I had it turn on 3 times and wouldn't disengage and I got tired of messing with it. They turned it off for no charge as well. I could have turned it off with the TTS, but chose to have them do it since I was already on the road when it happened.
On your 09, UnB? You can turn it on or off yourself, at will, by rolling the throttle forward against the natural stop, and holding it of a few seconds. Cruise light green = on Cruise light red =off.
Jim
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Thanks- I am going to just shut the feature off- it's been more trouble than its worth.
(...)
Since the Moco makes it easy on newer bikes to turn it on or off, it is not much of an issue. Just consider that there is a reason, when it kicks in. I would not shut it off, but then I do not have the issues some owners are experiencing. My bike accelerates the same, whether the EITMS has kicked in before, or not.
Ride safely,
Louis
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Eqcons,
Yup you are correct, but it was not a 1 time thing for me and rather than mess with it further I went imo a more direct route for me.
I had the dealer disbale it 2 times through the throttle and it renabled both times, whether through my own not paying attention to it or someone else riding the bike. I got tired of it quickly as either time it engaged itself it would not release as it should so rather than mess with it further I brought it back to the dealer as one would have treated it like on an 07 bike.
I had it disabled at the ecm level vs. just on or off on the handle grip. At the time I didnt yet have a TTS unit for the bike so I had the dealership disable it for me. I believe they did it through the digital tech as they would have on the 08's or earlier models.
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Eqcons,
Yup you are correct, but it was not a 1 time thing for me and rather than mess with it further I went imo a more direct route for me.
I had the dealer disbale it 2 times through the throttle and it renabled both times, whether through my own not paying attention to it or someone else riding the bike. I got tired of it quickly as either time it engaged itself it would not release as it should so rather than mess with it further I brought it back to the dealer as one would have treated it like on an 07 bike.
I had it disabled at the ecm level vs. just on or off on the handle grip. At the time I didnt yet have a TTS unit for the bike so I had the dealership disable it for me. I believe they did it through the digital tech as they would have on the 08's or earlier models.
I catch your drift, I dig where you're coming from, and I know where it's at. :2vrolijk_21:
Jim