{B4206} Use O2 With Open Loop Commanded Fuel Table
{B4206} Use O2 With Open Loop Commanded Fuel Table
I auto tuned my VE (BEN's == 1.00+/-0.01) and am still in auto ve tuning mode, and I enabled B4206, and now what do I do...?
My log (I'll post a picture later) shows STFT's active, and the WBO AFR not always following the commanded AFR, it follows it at larger throttle positions;
...hmmm... I'm still thinking out loud... any comments...?
Last edited by joecar; April 7th, 2006 at 05:49 PM.
So was/is your intention to go back into Closed Loop? In the V3 Custom OS the B4206 cal is not present. It sounds like you are attempting to get the equivalent of the Semi-Open Loop?
Could it be that the O2 switch points are off? I'm kinda thinking out loud as well
Andrew
EFILive Crew
My intention was to see what B4206 does, but I'm not sure what to look for.
My question would be "How does B4206 work...?"
It uses STFT to trim to the OLFA B3605 table, right...?
How far from EQ 1.00 can B3605 be and have B4206 be able to trim...?
(Log is on my laptop, have to wait to 'til I wake up tp post pic).
I didn't just wake up now, I've been running some 240V wiring for our dryer...
Here's images of B4206 in action...
I should have logged HO2SV11 and HO2SV21...
I'm still playing around with this to see what it does.
More pictures of this mornings log of B4206
Last edited by joecar; April 10th, 2006 at 08:05 PM.
It seems the actual AFR is "short term closed loop" trimmed to 14.63 below some throttle position, regardless of commanded AFR;
and above that throttle position the mode is "short term open loop", and the actual AFR follows the B3605 OLFA table (the commanded AFR);
so where is the tuning parameter for the "B4206 short term closed/open loop" throttle position; I don't see it anywhere...?
Is this how it works...?
Last edited by joecar; April 11th, 2006 at 02:18 AM.
interestingly I am looking for info on this, did you find anything out? I'm swapping from Custom OS3 to 12225074. I've got b4205 set to standard so sftf should activate anyway and ltft are also enabled just dont know if I should activate b4206
No, I didn't have time to dig any deeper, and then I switched to COS5...Originally Posted by stigmundfreud
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