jonnyk
November 30th, 2009, 02:20 PM
Went to put a base tune into a friend's used truck that he just bought it is a 2003 Chevy Silverado HD (LQ4 / 4L80E). It has a profile of:
Hardware 12570558
Operating System 12593058
Calibration 12579403
EFI Live read the tune from his PCM correctly and everything looked happy. After I changed a few parameters I went to write back the calibration and it said there was an error - the PCM had an incorrect serial # and it would have to have the OS flashed again.
It previously had a Hypertech tuner that we had, and I had "restored factory settings" but maybe it overwrote something in the past that it wasn't supposed to.
Should I try to reprogram the entire OS off his bad copy with my changes in it, or should I use one off the tune repository that might be a different OS but with the same calibration? A little at a loss here. Any input much appreciated!
Hardware 12570558
Operating System 12593058
Calibration 12579403
EFI Live read the tune from his PCM correctly and everything looked happy. After I changed a few parameters I went to write back the calibration and it said there was an error - the PCM had an incorrect serial # and it would have to have the OS flashed again.
It previously had a Hypertech tuner that we had, and I had "restored factory settings" but maybe it overwrote something in the past that it wasn't supposed to.
Should I try to reprogram the entire OS off his bad copy with my changes in it, or should I use one off the tune repository that might be a different OS but with the same calibration? A little at a loss here. Any input much appreciated!