So my HPTuners showed up yesterday and I couldn't wait to start using it so I plugged it into my daily (bone stock Gen V 5.3) and nerded out for awhile (my fiancee's words). I went for a short drive and recorded some data and took two screenshots - cruising and WOT - so I could see the difference between the two. I'll build a configuration tonight so I can plug into my 68 tomorrow and see what's going on with it.
I noticed that at cruise my STFT's and LTFT's were all within 4% so that goes to show how well GM has these tuned. It was also cool to see it go into open loop at WOT and to see what all of the sensors do.
What I don't understand is all of the throttle position channels and why they all read differently. At WOT, only 1 of 4 read as 100%?
And do these Gen V's run off variable fuel pressure? It's my understanding that Gen III's and IV's require a constant 58 psi, but the reading on my Gen V was anywhere from 40 to 70.
And why don't I have a reading for injector duty cycle? Wouldn't this be useful in tuning to know the limits of my injectors?
