$OD Lean Cruise

[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

[RobertISaar]

yeah... this won't be too bad though, compared to my nAst1 project. i expect maybe 75-100 bytes of algorithm for this, plus whatever calibration bytes do get decided upon.

as a comparison, in normal 6D/88/8F/A1/DF/P66 V6:

there is no timer for high fuel alone (just for high spark)
there is a MPH requirement and hysteresis companion
"highway spark" mode must be active to allow highway fuel (which also serves as a secondary MAP cutoff)
option for 4th gear only
option for TCC locked only
minimum coolant temp
minimum RPM
maximum MAP

now in my personally modded P66 V6 code, i've made it a requirement for both high spark and high fuel requirements to be met before either is allowed to activate, essentially making my high spark stuff a "highway fuel active spark modification".

[FSJ Guy]

I'm running $0D with an automatic, but not using the transmission control, and would be glad to help out, too. I have easy access to a 75mph highway to test it, too. :D

Lean cruise would be an awesome addition to an already excellent code/computer combination!

[93V8S10]

There is a way of doing something similar to lean cruise in $E6, $0D, $0E, and $31. $0D listed.

Title: Open Loop AFR Enable
Location: 400D-Bit 0
Usage: Air Fuel Mode Words
Tips: Enables use of L4BB4 "Open Loop AFR vs. Temperature vs. Vacuum" table for closed loop fueling, when coolant temperature less than L48C7 "Maximum Temperature for AFR Lookup in Closed Loop". Can be used for a "lean cruise" or other specific fueling conditions.

Title: Maximum Temperature for AFR Lookup in Closed Loop
Location: 48C7
Usage: Closed Loop Qualifiers
Tips: If temperature less than setting, table at L4BB4 "Open Loop AFR vs. Temperature vs. Vacuum" will be used for closed loop fueling instead of L48DD "Stoichiometric AFR", but only if L400D Bit 0 "Open Loop AFR Enabled" is enabled.

Title: Stoichiometric AFR
Location: 48DD
Usage: Open Loop AFR Parameters
Tips: Used if temperature greater than L48C6 "Minimum Temperature for Closed Loop". Used if temperature greater than L48C7 "Maximum Temperature for AFR Lookup in Closed Loop" if L400D Bit 0 "Open Loop AFR Enabled" is enabled.

Title: Quasi- Closed Loop Lower AFR Limit
Location: 48DF

Title: Open Loop AFR vs. Temperature vs. Vacuum
Location: 4BB4
Usage: Open Loop AFR Tables
Tips: Normally used for open loop but can be used in closed loop if L400D Bit 0 "Open Loop AFR Enabled" is enabled and temperature is greater than L48C6 "Minimum Temperature for Closed Loop" and temperature is less than L48C7 "Maximum Temperature for AFR Lookup in Closed Loop".

[EagleMark]

TunerPro has a S19 option I could never get to work. The $42 Lean Cruise Patch was a S19 file, I made some changes to it and got it to work through Command Prompt in windows 7. But $42 had it built in and turned off. The paremeters for it to work would be all we need I think. The XDF items are in $42-1227747-V3.xdf Here's a write up with S19 patch file and how to. HTH!
http://www.gearhead-efi.com/Fuel-Inj...on-1227747-ECM

[RobertISaar]

that solves the problem of patching using a S19 file, but how to generate a S19 file without an assembler?

i've also never got the patch option to work, but it's new to me so IDK.

[RobertISaar]

i hate to do so, but maybe i'll have to drop back down to a 32 bit OS...