Originally Posted by
Hondaeater
The Low and high is only for color, it will populate if the parameter is set up right regardless of those hi lo settings. But using red and blue or red and green can help visually.
I do not see the WB input?
Do not start tuning the AC ON until the BRA and other idle parameters are set. It takes a little while to get this set up but then most of GM strategy works without adjusting much of it. This is where things go off the tracks.
It is so confusing which file did you use to get the cold start idle log? I see that it was probably the tune I posted before because the idle spark is 20deg like I set it. It is obvious the VE needed to be lowered from the latest failed idle spark tune but I wanted to see where it was. I do not think you used that file as there is so many other things changed between that one and the LTFT maf step 2 tune file.
I do not know where that latest failed idle file came from but unless I start over I try to let it ride and see what it does 1st with the proper channels list.
Things like the EGR airflow, DFCO, COT enable, etc because I do not know enough about your build to make those changes. Lowering the VE was a good start at the idle portion. Depending on which file was used it looks like it needs even less in that 400-1200rpm at 65-50kPa, about 10 percent less. If you make another log at cold start and post the tune used to make it, name it something relative to the tune and function, like truck VE 01.hpt then truck VE 01 cold start.hpl or truck VE 01 drive.hpl or 1Tank MAF 01.hpt something like that. Make it relevant.
Adding notes to the details of the build is very helpful.
Check out the pics I hope they help.
You can turn off the LTFT in idle but I would at least clear the LTFT using the green button special functions in Scanner. Each time you update the tables it should be reset/cleared and then go drive it for about 10 minutes around town to let the new table settings have some data in memory. Drive as smooth of a throttle change as possible, meaning you do not want to be stabbing at the Throttle off and on all the drive, instead move minimizing the big changes to TPS%. If you go from say 10% TPS to 35%, ok but now hold at 35% for a while to gather data before making another big change in TPS. This will start the LTFT memory with good data. Even a gradual increase will work but smooth not necessarily real slow just smooth and NOT Off-ON-OFF the gas that is the worst data. It takes a long time to get consistent data. Just use the LTFT+ STFT or OL with the WB. I do not see the WB so I guess you have not got that input into the Scanner.