[Jndroark]

Congrats!  Now I'm wondering if the temp. gauge is kinda accurate, at least if it's registering the temp rising/falling then maybe it's reflecting the hydraulic fan cycling?  You do have the series 60 engine?  What about the Detroit readout?  
I agree with Richard with getting a VMSPC and using that to interface with the engine DDEC computer.

Thanks, yes it's the series 60 engine, the fan cycling seems to make the most sense.  Is VMSPC the silver leaf system that I have read about?

I will re-read the thread about this interface.