View Full Version : avg ltft and a/f plot

June 6th, 2005, 06:40 AM
1-How can i get ltft avg per ftc so i can average ftc- thru 14.
2-is thier a way to chart air/feul ratio aross rpm range--how?

June 6th, 2005, 09:58 AM
Create a map that mimics the LTFT matrix displayed by the Scan Tool (in menu option: "LS1/LS6->Longterm fuel trim cells" for your vehicle. See attached image for an example. I have also attached the MAP definition for the map shown in the image.

You could log both banks individually, or you could create a calculated PID that averages both banks together and log the average in a single MAP.

To map your AFR you will need a wide band O2 sensor.