Fuel Pressure 63lbs SL1
 

I have been experencing severe, so called Bucking when going up any kind of a hill or trying to go above 40mph. Had fuel pressure checked and found 63lbs. I beleive it should be between 40 and 55lbs. New filter\Regulator.
It the return line was pluged between regulator and tank I beleive it waould cause this problem. Car has only 47th miles. To prove this, is it possible to blow air through this return line at Filter\Regulator to tank to check this. I am not sure if 7lbs above spec would be any cause for concern? Only code in OBII was rich fuel Trim.

Thanks
Calvin