duplicate post

 

Here is what HD Service Bulletin M-1191 says on the subject.

System Function

When engine temperature reaches a pre-determined point,
the EITMS will turn off the rear cylinder fuel injector. Idle
speed will be maintained, however the rear cylinder will
become an “air pump” which will then work to cool the
engine. The conditions required for this to occur are:
● High engine temperature
● Engine must be at idle speed
● Vehicle must not be moving
● Clutch lever must be pulled in or transmission in
neutral
When these conditions are met, the rear cylinder will stop fir-
ing until one of the conditions listed above are no longer met.
If the vehicle is moving, the engine temperature drops, the
throttle is opened from the idle position, or the clutch is eased
out while in gear the rear cylinder will again fire normally.
When the engine is in EITMS mode you will notice a differ-
ence in idle cadence. Additionally there may be a unique
exhaust odor. These are both considered to be normal condi-
tions.

 

Thanks Frenchbiker. I assumed that exhaust odor, which I experience, was some unburnt fuel from the rear cyl making its way out.

 

Hi,
So on say a 2007 RK with throttle cables and no cruise control (as i have), you can get it switched on by the dealer but has to stay that way ? (you can't use the throttle forward idea).

Thanks.
Rowle.

 

FYI, when the software recognizes high temps, both fuel and spark are no longer delivered to the rear cylinder. Owners can also turn EITMS on or off through the SE Pro Super Tuner if they have the tuning software installed.

 

Thanks, French biker. That's the best explanation I've seen on the workings of the EITMS.

 

Right. Because the 2009 and later (2008?) have throttle by wire, the roll forward sends an electronic signal to the computer. Since it is electronic, they could make the throttle do whatever they want. Turn on the left flasher, turn on the ignition, hold the brake in and they could make the throttle dim the lights if they wanted to, or control the radio volume.

 

Here's what my Super Tuner manual states about EITMS. I found it pretty interesting.

Heat Management System
The ESPFI systems also incorporate a sophisticated heat management system that operates in
three-phases to keep things cool in extreme conditions.
Phase I: If the ECM detects engine temperature above approximately 300° F while moving or
stationary it reduces the idle speed. A lower idle speed produces fewer combustion events per minute
and that reduces engine heat.
Phase II: If the ECM detects an engine temperature that’s still drifting higher while moving or
stationary it richens the AFR. An increased amount of fuel in the air/fuel mixture has a cooling effect
on the engine.
Phase III: If the ECM detects an engine temperature that’s still drifting higher while moving or
stationary it directs the fuel injectors to skip, (only when the bike is stationary) and not deliver fuel on
every intake stroke. This limits the number of combustion events taking place, which produces less
heat.
The three phases just described function seamlessly, and the rider may not notice the transition from
one phase to the next.
Model Year 2007:
For all Big Twin vehicles there is an optional Heat Management System called the ‘Engine Idle
Temperature Management System’ or EITMS. The Tuner software allows the EITMS to be turned
ON/OFF.
For those riders who frequently find themselves in riding conditions where the vehicle is subjected to
prolonged idle conditions the optional ‘Engine Idle Temperature Management System’ (EITMS) is
available. This feature offers limited rear cylinder cooling with the vehicle stopped while the engine is
left at idle.
Enabling EITMS will cause the rear cylinder to be shut OFF when ALL of the following occur:
Engine Temperature reaches ~300F.
And the vehicle is at IDLE.
And the vehicle is STOPPED.
NOTE:
Customer benefits (for Rider Comfort) – If a customer experiences frequent riding conditions where
prolonged idle conditions create excessive engine heat, EITMS offers limited rear cylinder cooling
with the vehicle stopped and engine at idle. While enabled, the customer may notice a unique
exhaust odor which may be objectionable. The EITMS does not address engine heat issues resulting
from other operating conditions.

 

Is there a way to adjust the temp lower, and would I even want to?

 

I am sure with the right computer setup you could make changes to it, but at some point the engine needs to operate in a certain range.

In all honesty, I cannot tell the difference at stop lights. The rumble changes, the odor shows up but I don't feel a cool breeze between my legs. You are sitting there in 90 degree weather on 110 degree asphalt with 100% humidity and a 280 degree motor between your legs. Would it matter if it was 262, 250 or 200?

Mid-frame air deflectors make more of a difference IMHO.