05Pzev wrote:
Bamofo wrote:
td-d wrote:
ROM:0002FD80 AF3_Correction_Limits:.float 0.5
no kidding!! ok so the addition to your filter in your original statement on how to find it should be
To do your Search for 3F000000BF000000 and then look for the next 4 hex values to be 4F22
I see you made a very long string.. if people are just making a quick look in their rom... this helped me find it for quite a few roms.
I am trying to do as suggested here. I find 4 instances of 3F000000BF000000 but nothing immediately followed by 4F22. What am I doing wrong?
The values I find are 21C60 (I do see 4F22 here but not immediately following), 20644, 20114, 1E148 but unsure what is what from there.
Any way to tell what these different -0.5 and +0.5 values belong to?
Note, this car has 5 o2 sensors (2 front AFR, 2 mid post each header cat and 1 rear post combined exhaust cat) so I'd love to ignore all rear 3 if they all do fuel corrections. I assume that at least the mid 2 o2 sensors do, not sure about the rear most one. It is possible only (#1, #2 of course) #3 and #4 do corrections.
So I'm assuming 1 of them is AFR #3 correction and 1 is AFR #4 correction ???
So... on my ECU (2F220A4706) I decided to do some testing. I disabled each one of the results 1 by 1. I only went until I found what I thought I was looking for:
20644 seems to disable A/F learning #3 - now reading 0 (#4 was already reading 0).
20114 seems to disable A/F correction #3 and #4.
What I did was zero out the 3F000000bF000000's one at a time and then monitored after each. After 20644 I noticed A/F learning #3 went to 0, A/F correction #3 and #4 stayed up. I left 20644 zero'd and moved on. After 0'ing 20114 correction #3 and #4 went to 0, so I stopped there sicen both learning and correction at 0.
I couldn't figure out what 21C60 did nor 1E148 (although I wonder if I had been monitoring AF1 and AF2 if that would have been obvious.....).
I'm assuming that I've accomplished what I wanted here - to ignore whatever the rear O2's have to say as it pertains to fuel trims, but can someone explain to me what the difference is between what I've just done and the other thread which discusses "Rear O2 closed loop target limits"? Is there still some impact my rear O2's could have? I don't need to remove the sensor itself, just don't want it altering fueling.
Should I still be looking to disable additional corrections and if so, how can I monitor/test those?
And finally... again, I have a 5th O2 sensor on this thing... no idea if this one actually does anything (fuel trim?) other than monitor the rear most Cat...
There is also 1 instance of BF0000003F000000 in my rom...