|
For what its worth, I gained 3-4 MPG after a bunch of supporting mods and tuning on my Duramax and the tune isn't really an MPG tune but more of a towing tune. I have a programmer/flasher called EFI Live which essentially makes the OEM engine electronics a standalone fully tuneable computer. I can adjust anything I want, engine & transmission plus it is a data logger and scan tool. Its a pretty sweet system. I deleted the large coil intake heater element (not needed here) and went in with my laptop and switched the circuit off in the ECM and turned off the fault code for it! I can even change the message in the inst. cluster when you start the vehicle from, "Fasten your seatbelt" to what ever I want it to say! I wish this type of system was available for more vehicles.
|