Ecomike said:The scanner I bought only shows the last fuel trim values that existed when a DTC code, like a missfire is thrown. So it takes a better, more expensive scaner than what I bought to get continuous fuel trim data, but now that we know what it is and what it does, and how to use it, we know better what specs to look for in a scanner tool. I just wish I had known it 3 months ago.:twak::smsoap:
The scangauge manual talks about xgauge, which can look at non-standard stuff and includes sending codes to the computer to ask for specific information. I didn't read that part too closely 'cause it was over my head and I didn't have any ideas about what to ask for, but I think that the scangauge may be able to display fuel trim IF I knew how to ask for it. Which I don't.
Now, I wonder if this trim can be messed with to adjust the mixture? I don't know how quickly it updates, but if a command could be sent to lean out the mixture by 2%, say every second or three, it would still accept input from the 02 sensor but would bias the result. Not a simple, practicle idea though.