Lq4 and a grany low muncie. compatible?
02-21-2017, 03:18 PM
#22
Teching In
Thread Starter
IT LIVES. Finally got a tuner to look at my ecm only to find out that the vats was not turned off like painless promised. Thanks for all your help. Now I'm going to write a very disapproving letter to painless.
05-29-2023, 08:16 PM
#23
Swap Chevy colorado 5.3 You have a NNBS 6.0L Gen 4 with a E38 ECM. Although it is a 6.0L it is not really a LQ4. Those were last used in the 07 Classic trucks. And that truck would have has a separate T42 TCM. At this point without seeing the calibration in the PCM it's unclear if the VATS was really disabled. As well as the starter checks. And even if whoever did the initial tune disabled the VATS, if they did only a Write Calibration and not a Write Entire it would not be disabled. In those ECMs the VATS is part of the OS and a Write Entire has to be performed for it to be disabled. I think your problem is VATS.
