I decided to play with the data logging progam from my special forces tuning software. I like the way it displays everything in real time. But, what is the typical maf voltage for a 03gt? mine spiked to 4volts when i did a blast to 100mph is that norman? how often should i be in and out of closed loop? mine didnt stay in closed loop very long. and what does closed loop mean? also my timing was all over the place at idle, is this normal? thanks.