Pids for pressure ratio

[mtndew]

Hey. Thanks in advance for the help.

I have a stock 2018 Silverado that I'm starting to tune. MAF is done. I'm on the speed density / vve table. In the vcm scanner I can't get the histogram to work.

I've created a user math of map / baro

Created a histogram with parameters of lambda & afr -> eq ratio error

Added rpm on the columns and my user math on the row

The histogram wont produce any data. I think I'm using the wrong pids but I can't find a combination of them that work together

[TriPinTaZ]

There is an old thread with detailed information on this. I'm sure if you search for it you will find it. You don't need to create user math anymore either. You do need to be logging the proper PIDs though.

[sevinn]

Go to tools>maths and look under pressure for the pressure ratio math. If you are logging 50030 and 50032 you are good to go.