EPROM Programming

[WEG1192@aol.com]

Hello All,

I am interested in modifying my GMECM EPROM. I have read Programming 101 and 
the tuning tips. So is it as simple as getting an EPROM burner, getting 
tuning software like Tunercat, getting their chip TDF file for the ECM that I 
have, making the changes, and then burning the chip? Will the .bin files on 
the DIY-EFI site work without any changes? Or do I have to remove the VATS 
and EGR functions? In reading the tuning tips by Dr. Bruce Plecan, it appears 
that you make a change, drive the car, then make another change. Isn't that 
very time consuming since you have to reburn the chip every time, or is he 
using some real time program he didn't mention?

Last, does anyone know if the fuel pressure on a TBI system changes with 
engine vacuum like it does on a TPI system?

Thanks for the help.

John Wilson
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