Eitms kicks in at what oil temp???
Ultimate HDF Member
Joined: Dec 2006
Posts: 5,878
Likes: 17
From: The Desert SouthWest
This is from the Super Tuner Users manual:
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 thats 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 thats 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.
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 thats 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 thats 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.
Ultimate HDF Member
Joined: Feb 2010
Posts: 5,301
Likes: 1
From: Biloxi, MS
I then preceded to turn the EITMS off once I got to where I was going...
Last edited by rushbass; Jun 24, 2010 at 05:30 PM.
Intermediate
Joined: Jun 2010
Posts: 46
Likes: 0
From: usa
Happened to me on the dyno from what the dyno guy said he sees more 09-10 T/C doing it. Started cutting out when oil temp got to 260 deg also it had 3 high powered fans too.I asked where the sensor was at said it reads from the head temp.
Advanced
Joined: Jun 2010
Posts: 84
Likes: 1
From: Idaho
So, what about shutting off the bike when sitting at a long red light? Is that preferable to letting the EITMS shut down the rear cylinder fuel and just idling like that? This is my first Harley and first air cooled bike and I just want to make sure I don't fry my motor sitting in traffic idling on one cylinder.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
Oil temperature and head temperature are not directly related, and you can't use a formula (like CHT-30°=OT) to calculate one or the other based on one known value. The oil temp will follow the head temp, but it lags far behind it, both increasing and decreasing. You can see this readily by monitoring both together as I've been doing for the past two months. I've seen CHT, measured from the bike's J1850 port (FCHT sensor), hit 280° in summer traffic while OT was <200°. CHT will change before your eyes based mostly on the amount and temperature of the air flowing over the cylinders, but OT changes with the speed of molasses.
EITMS is regulated by the front CHT, and when it kicks in varies from year to year. My '07 kicked in at exactly 290°, but I've heard later models do so earlier, like 285°. I used past-tense because I just updated the ECM which nixed EITMS on my '07, but it almost never kicked in on the road anyway.
EITMS is regulated by the front CHT, and when it kicks in varies from year to year. My '07 kicked in at exactly 290°, but I've heard later models do so earlier, like 285°. I used past-tense because I just updated the ECM which nixed EITMS on my '07, but it almost never kicked in on the road anyway.
Last edited by iclick; Jun 24, 2010 at 11:32 PM.
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Tourer
Joined: Oct 2009
Posts: 250
Likes: 0
From: RIO GRANDE, TEXAS
Thanks for all your relies. I did ask for a correlation but I guess I asked the wrong question. For those that have oil gauges, at what temperature does the eitms normally kick in? I know I got about 250* but just curious. Once again thanks for your input.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
If you really want to keep tabs on when EITMS kicks in you should get a CHT gauge.
Last edited by iclick; Jun 25, 2010 at 12:58 PM.