Im new to this thing, is there a difference between a 2004 LB7 tune and a 2002? Stock tunes nothing modified. It commands rail pressure and gets it, but none of the injectors are working. Tgey all stay at 0 when cranking.
It ran fine before, but the PCM was locked with a junk programmer, so I sent it off to get unlocked so I could tune it. The operating system had to be changed, and it flashes fine with the '04 tune. '02 tune won't flash due to the new OS. Vehicle cranks but no start due to injectors not working.