Quote:
Originally Posted by kslg
I've been searching through threads and can't find this one...
When does the ECM on the 07-08's switch from closed loop to open loop?
I know it is closed loop at idle and cruising; someone told me it stays in closed loop until higher than 50-60% throttle.
When it does switch to open loop, has anyone seen with a sniffer what the AFR goes to? I've heard that it is significantly richer.
I am just doing intake and exhaust and don't want to go to a full programable fuel system. I have seen the voltage splitters from nightrider and was thinking this is all I might need...
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Not all Ecm's are programed the same, the heave bikes come out of closed loop a little earlier than a lighter bike. Most bikes go into closed loop at 20KPA and come out of closed loop at 80 to 85 KPA. Now depending if your going up hill or down hill effects the KPA at different throttle positions so to say it comes out at 50~60% throttle would be a false statement at times.
When it does come out of closed loop the AFR is generally 13.5:1 to 12.5:1, again, depending on the load of the engine.
The idle is not in closed loop...the AFR is usually from 13:1 to 13.5:1.
With a Race Tuner we are able to control the switching point.
Raising the voltage on the sensors will make the bike run richer but your putting the sensors on the edge of their learning ability which stress switching operation of the sensor to an earlier failure....when it fails (in about 6000 to 10,000 miles) you are automatically set at at 14.6:1 in every grid of closed loop operation. (this is not good)
