Originally Posted by sampleboy
Try flashing to the LWG map on your ap.
He has a TP tune, so he can't use this feature as he isn't using a COBB Ots tune. He could email TP and ask for their version of a LWG tune.
I wouldn't worry about 18psi. Its not that high and not that far off of the 16.5 target. Its also kinda common in higher gears as mentioned.