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Originally Posted by ptparker
http://www.hptuners.com/help/demos/C...stom%20PID.swf
This will tell you how to make the custom PID and and how to put it in the histogram. THe only difference is use the PID values instead of the SENS values.
Also when you create your custom histo and your PID, make sure you add the new PID to the list of monitored sensors before your start recording.
Paste [PID.17]<80 in the plot filtering. PID 17 is the throttle position. Also change the cell hits required to 40. Maybe don't do the cell hits required part until you want to actually modify the VE. It makes real time monitoring a bitch.
Also don't add the number. Fuel trims are a percentage, so to compinsate for a -8, multiply the value by .96 (100% - (8%/2)). For a +12, multiply by 1.06 (100% + (12%/2)).
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Nice stuff, but I would either only use ONLY LTFT or perhaps alter/reduce the weighting of the STFT counts as the change in fuel control for each "step" in STFT is generally considered to be something like 1/10 of the authority in actual IPW as compared to a single step in LTFT.
Did that make sense??
STFT= x "baby steps" (actual amount varies) to equal a single LTFT step
Wop