I have a 5.3 .100 over Gen 3 PCM
mild cam
dart heads
ls2 intake, plans to upgrade that later
My issue is when I goto drive it and put it in gear, it idles fine but if I let off the brake and the car beings to roll the idle go nuts and surges and stalls and I may be rolling at 1 or 2 MPH. I can restart it and it will do the same thing again when I let it roll. I have to gas it to avoid that situation.
However once the engine is warmed up I can turn off the car and restart it, at that point it usually will start running good and rolling will not affect it anymore.
also when it is cold if I am driving it and come to a stop the engine does not idle down gently, it just drops right down. but after a restart when warm it will follow the speed of the car with a higher idle till I fully stop.
I attached the tune. I need to drive it and get some log data but with the issue being idling and slow roll I am not sure what it will show.