What would this custom PID code look like?

[animuL]

I want to make a PID that will return my combined LTFTs and STFTs but not return anything when in fuel cells 20,21,22. This is for doing a VE tune.

I was thinking it would be adding the LTFT PIDs then dividing by two to get the average, then doing the same with the STFTs, then adding those averages together to get the total learn value (as described in the help file). What I do not know how to do is make it only do this when in fuel cells other than 20-22. Because it states in the help file that fuel trim values in these cells are not and should not be permanent.

[John_D.]

You could set up the PID, then use the histogram to filter out the fuel cells.

[animuL]

Not sure exactly how to do that... you mean add something to the histogram to identify when it is in what fuel cell, or just do it manually?


Right now I just have:

(([PID.6]+[PID.8])/2)+(([PID.7]+[PID.9])/2)

This is adding the average of bank 1 and bank 2 LTFTs and STFTs together to get me the value that I want to adjust the VE table by. But as I understand it this current PID will be effected by trims in cells 20-22. So how can I make it so it only displays the result of the above PID when in cells other than 20-22?

[animuL]

oh i see the filtering thing... thanks!

[John_D.]

cool.

[louvered97gtp]

Hey guys, sorry for the dumb question but what is meant by cells 20-22? I keep reading reference to individual cells. Is this the column#22 or something? Or is this a quadrant area referred to as predesignated #? Where in the help file is this?
Thanks,

[animuL]

There is some info in the help file, but I can tell you right now that your GTP is different and I'm pretty sure no one really knows how the FTCs work in those cars.

[5_Liter_Eater]

Yea, search for "volumetric efficiency" in the scanner help file. It's basically dividing the MAP VS: RPM table into different sections. Shifting them around can help in keeping them in check.