Originally Posted by
ralmo94
Yeah you need checksum plugins to save in tuner pro. If you ever get one that has a wrong check sum universal patcher can fix it.
You will likely never get 0 fuel trims, but as close as you can get to between 0 and -5 is a good goal.
You have to disable MAF and log it, then when you have a table of fuel trims, you multiply your VE table how far the fuel trim was off.
Then repeat, until you get it as close as you can, and it helps to look at your VE table in 3d. You want to look for any dips or rocky areas.
A little rough is ok, but generally speaking it should be linear and somewhat smooth. Ve should increase as rpm and kpa increase. Once you get past the power band it should drop off a touch with rpm, but more kpa should always be more or the same VE, never less in theory. When you make changes, you should also look at the areas you weren't able to log and make a guess at what they should be based on the areas you did log and change. If I keep getting a dip I like to take the cells around it and with a calculator average them, and then either set them all to the average, or set them to a linear value that averages the same thing and log again.