TunerPro User Forum

The minimum pulse width is programmed into the code by the factory engineers. It specifies the minimum pulse width that the ECM can produce reliably. It's basically a hardware limit because of the limitations of the injector driver transistor(s) and the injectors. The ECM/PCM calculates the proper i...

A 2732A EPROM has a size of 32K. That is 32768 to be exact, which is equivalent to $8000 in hexadecimal. Read the chip from $0000 to $7FFFF. Hexadecimal addresses do use address zero, so you have to subtract one from the uppermost address. After you do the above the last two bytes will contain the s...

Use the Device Manager to find out which port the Bluetooth adapter is on. Then put that in the TunerPro port configuration.

The Red Devil River Bluetooth cable puts a 10K resistor across ALDL pins A and B and expects data to come out on pin M. If your car outputs data on pin E then it will not work. The USB connector is for programming the device. It is a standard Arduino MEGA microcontroller board with a custom Bluetoot...

All 1227165 ECMs are able to communicate at 8192 baud. My 1986 Corvette with BUA firmware communicates just fine at 8192 baud with Diacom software. See this note from Ward Spoonemore, who disassembled and commented the very first BUA "hac" back around 1995: * The ECM will listen for 50 ms ...