Ok today i made that 2 transistor cable because i wanted to try out tuner pro. I made the cable 4 times and it would not work at all i tested everything individually and it all checked out im getting the 12v dc from port F. I think port M is the port i need for tuner pro but i dont have that one on my car so i just used port E which i think is only 160 baud but i could be wrong. I have used winaldl with the one transistor cable thats on their site but i figured tuner pro was better so ide give it a shot. Im using windows Xp. When i plug everything in tunerpro just tells me no hardware found ive tested it on all com ports still got nothing so idk whats wrong. If anyone has tried tunerpro with their 2.8l lmk how you did it