$OD Lean Cruise

[RobertISaar]

plenty of space starting at 6B83 to impliment a patch in 0D, i'll assume 0E is similar.

what all do you guys want in terms of prerequistes to enter/stay in lean cruise? time since startup/coolant temp/etc?

and other than obviously a modified AFR, do you want anything else to be triggered be lean cruise? added/removed SA?

and i assume you'll want a table for determining the target AFR based on MAP? or MAP and RPM or ?????

[JeepsAndGuns]

I could also be a test mule. I am running $0E with a manual trans. I also just installed a innovate wideband 02 and gauge, so I can actually watch and see if its working, and keep an eye on it to make sure it doesnt do anything funky.

I would think a timer or "delay" would be a good idea. That way when you set up what parameters need to be met to enable it, it will then start a timer to engage it. That way its not constantly trying to kick it on, then back off.

I have no clue how it exactly works in $42. But thinking of what it does, I would think the way I would want it to work, would be set up parameters to only enable it above XX MPH. Add something in there for map, so if the map drops below a specific range, it drops out of lean mode and goeas back to regular. I would think this would be good when pulling hills. I would think pulling a hill, or hitting the gas to pass someone, you wouldnt want it to be lean. And then add a timer or delay, for when you get above XX MPH, and below XX MAP, start a delay of mabey 30 seconds then enable. Then as long as your above XX mph, and stay below XX map, it will stay in lean mode. Probably would be a good idea to add a temp parameter, that way you have to be above a specific temp to enable it (so it doesnt kick on, with a cold engine). Mabey a max temp would be wise too? That way, if you start running hot, and temp climbs, it goes back to regular fuel to help keep from over heating. (I know leaner = usaly hotter engine)

But I have no idea if something like that could be set up, as I have no clue about how the HW lean mode works, or how you could hack/add something like that to a code.

[gregs78cam]

I'll test the beta as well. I run $0E in both my truck and Camaro, and they could both use a little better mpg.

[RobertISaar]

all of that stuff is relatively easy to setup, assuming there is some free RAM leftover for the timer itself.

but once there is a general agreement on what all it should be, i'll write up a patch, and whoever wants to test it will need to send me a BIN, i'll apply the patch, send it back, test, refine if necessary, then release.

someone would probably need to reformat my work a bit to make it assembler-friendly though, since i do all of my patching via a hex editor.

[gregs78cam]

Speaking of 'patches', I have been wondering this for a while......Is there a difference between "patching the bin" using whatever DOS program, and just writing the code in the bin using the hex editor, like what we do with the cooling fan code?

[RobertISaar]

as long as you end up with the same file by both methods, then no, the only difference is time.

unfortunately, i can't seem to get ahold of any assemblers for the 6811 that work with a x64 OS (Vista Ultimate x64), so i have to patch it old-school.

once one is patched though, you can make an XDF with all of the locations of the patch defined and literally copy/paste the patch from one BIN to another.

[gregs78cam]

OK, that is what I figured, just wanted to make sure I understood it correctly