Hello everyone, what may be happening when I have a 5.3 pc and I convert it to 6.0 through a tune or a segment swap with the hp tuners, it has happened to me on several occasions that I start the start up is very high and very low slow, and on top of that the pcm commands an idle and the real one is usually 150 rpm above.
All engines are stock only to have been displacement changes or be a swap of a 5.3 to 6.0
what may be happening HELP HELP !!!