My car (94 mustang 3.8l) has a rough idle and no power until about ~2200 rpm. I already cleaned the MAF and IAT, replaced the fuel filter (whoever owned the car previously had the fuel filter on backwards), checked the spark plugs and plug wires, and cleaned the throttle body. I was viewing the data with the car running and the IAT and MAF seem to be working properly. The throttle position reads 14.26% closed and 86.23% fully open with the engine off, and between 14.12% and 14.52% with the engine idling. It seems to transition smoothly between ~14% and ~86% with the throttle going from closed to fully open. The timing advance reads between 18 and 26 degrees with the engine idling. The check engine light never comes on, but every once in a while it'll read three codes: P00<D, B2TAE, and ROR. I was wondering first if the throttle percentages are in the right range, and if the codes which seem to be nonsense might be an indication that the PCM is bad or on its way out.

 

As an update to the original readings: The fuel flow rate read between 23-24 cc/min, not sure what that is in psi and there wasn't an option to change the unit of measurement. I don't believe it was able to read the fuel pressure. I had to adjust the screw on the throttle body to keep the car running with the IAC unplugged, got it to idle at about 650rpm. EGR error read at -100% and EGR command at 4.31%. Timing advance varied between 15 and 18 degrees. Vacuum pressure read at -12.5psi. The engine load was at 42% after first starting the engine and gradually went down to 20% as the engine warmed up. The engine temperature seemed to read correctly, and never went higher than about 195(F) degrees.