I am tuning my friends L67 swapped 2002 f-body and we have run in to an issue where the car idles very rough and will surge to over 2300 rpm before we shut the engine off. We hooked up a vacuum gauge to the intake tube and it showed basically no vacuum. I think the issue could be the throttle body, since we are using the factory f-body PCM (tuned) and DBW Throttle Body. The HPTuners data log shows the throttle body position is 20% at idle, with the MAF reading about 1.8 lb/min of airflow, or 3700Hz if my calibration is wrong. My question is, what should the idle TPS and MAF readings be for a DBW throttle body on an L67? is there any way to adjust the throttle body in HPTuners if it is too high? Thanks in advance for any help.