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Just enabled lean cruise on a 2000 Silverado 2500 6L.
We notice that while rolling down the interstate that applying throttle causes a leaner condition than lean cruise. I was running the scanner and had the tune open, and we were out of the RPM/airflow cells where lean cruise is enabled.
Is this normal behavior?
Just watched on mine while driving (2005 1500HD 6.0L) , I did not see any "lean tip in" , LC would activate (16.x) and once I depressed the throttle it would go right back to Stoich (14.7) . I don't think we are seeing the correct and/or all MAP(s) that LC modifies .Quote:
Originally Posted by LinearX
Of course this was just with the V2 and wide-band , no laptop , watching AFR with the V2 display .
My VE and MAF are pretty much spot on so that may have something to do with it as well .
This is a bone stock engine that is running OS 12212156 from a 2002 6L Silverado. I have discovered that the IFR, VE, and timing tables are different between the tunes. I didn't do the original copy of the files, so I'm going to correct the 2002 OS to reflect the proper IFR, VE, and timng of the 2000 OS.
Not sure if that will have any bearing on anything or not.
is lean cruise adjustable in efi live?
wow, fast response's on this forum!
short answer yes.
LinearX,
I don't know about the 6L engine, although on the 5.3 GM got the 2004 fuel and timing setup much better. I have a 2k 5.3 using 2002 base and a modified 2004 timing/fuel. Be careful with the IFR, GM stopped using VRef ~2003-4 sometime.
Slow Down,
The lean cruise is very cool. You have to put the LC patch .cax file in: C:\Program Files\EFILive\V7.5\Calibrations, open the .tun file, enable the LC, do a full flash. From there on you can make changes to the parameters that were always in the tune program(they just did nothing without the .cax enable).
Look in sig 'personal junk/public' the LC patch.zip is there. There are many and confusing versions of .cax's. The one I suggested is the simplest one. I think the variables are in "scary things lerk in here" or some BS like that.
I'm going to go through the 2002 OS and populate it with all of the 2000 OS data. I've found that there are different part numbers for the injectors for each year, so I have to think that the differences in the data is real. Also the VE tables are WAY different compared between the 2000 and 2002 OS.Quote:
Originally Posted by acomp917
We'll see what happens.