ECM learning

stmpulr · 07-20-2008, 09:53 AM

Does the ECM on 07-08 Harley's learn and adjust to your driving habits over time. If you put exhaust on or ac will it adjust at all (change in a/f)? If so, if you disconnect the battery does it revert back to the original settings. Loose memory?

Just thinking out-loud.

Hobbit · 07-20-2008, 10:06 AM

basically no.
the Buell FI on the other hand Yes - the DDFI3 system on the new XB12 and XB9 learns to a certain extent - it will cope with an exhaust upgrade and learns your riding style, it use open and closed loop FI in the same ECM picking which bits of which map work best for the sytle of riding you are doing, HD is not this advance yet

smitty901 · 07-20-2008, 10:13 AM

If they do some of them must be sleeping in class.
They do not learn but do adjust to input they get but only with in a narrow window.
Example it you only add slipp ons it will adjust. With in the closed loop once out of the closed loop the 02senor is out of the picture anyway.

07-20-2008, 09:53 AM	#1 (permalink)
stmpulr Start The Engine Ride: 2007 Softail Night Train Join Date: 2008, Jul 02 Posts: 23	ECM learning Does the ECM on 07-08 Harley's learn and adjust to your driving habits over time. If you put exhaust on or ac will it adjust at all (change in a/f)? If so, if you disconnect the battery does it revert back to the original settings. Loose memory? Just thinking out-loud. __________________ 2007 Night Train (custom paint) Obsidian Black met. 2" Rush slip on's, lowered 1", SE HB, PCIII 800cc Polaris Asphalt Drag sled 9.67et @ 132mph F/S

07-20-2008, 10:06 AM	#2 (permalink)
Hobbit Moderators Ride: 2009 Custom Street Bob Join Date: 2007, May 18 Location: The Shires UK Posts: 4,020 My Mood:	Re: ECM learning basically no. the Buell FI on the other hand Yes - the DDFI3 system on the new XB12 and XB9 learns to a certain extent - it will cope with an exhaust upgrade and learns your riding style, it use open and closed loop FI in the same ECM picking which bits of which map work best for the sytle of riding you are doing, HD is not this advance yet __________________ Please stop by the "self help section" for maintenance tips, diagnostic codes and much more. >>Self Help Information and Tips<< click me!

07-20-2008, 10:13 AM	#3 (permalink)
smitty901 Moderators Ride: 2007 Road glide Join Date: 2008, Jan 01 Location: Wisconsin Posts: 2,215 My Mood:	Re: ECM learning If they do some of them must be sleeping in class. They do not learn but do adjust to input they get but only with in a narrow window. Example it you only add slipp ons it will adjust. With in the closed loop once out of the closed loop the 02senor is out of the picture anyway. __________________ The Infantry leads the way

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ECM learning

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