Quote:
Originally Posted by andrewb70
JP and I have discussed this quite a bit. When he was doing the white LS9 Camaro he had to do all kinds of BS to get it to work. He called GM and got some unclear information and was told PWM is not possible on the GMPP harness kits. This is in contrast to Scot's experience, but Scot's kit is much older.
I suspect at some point GM changed the firmware/OS (pure speculation) to render PWM not functional. JP ended up getting a used E67, refreshing it with a Corvette LS9 OS and was able to make it work.
Hopefully JP jumps in here to clarify, but that's my recollection.
Andrew
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While there has been several 'releases' of calibrations for the LS crate engines, the software has remained the same.
So enabling PWM fan control is matter of wiring properly and enabling in calibration.
Dave