I made this program to help tune the Carter BBD Carb. After a while I gave up on the Carter and Installed a Holley 500CFM 2BBL. I did get it to run pretty well but the carter was too small. I thought about releasing the code (Visual Basic 5) and the microcontroller schematics and firmware (Microchip PIC). It depends on the interest from others.... It actually worked fairly well and is optoisolated from the diag connectors. The PC interface is through a 9pin Serial port.