I’m lost. PSI? If you mean mpg, and you are getting 32, you may have gotten into a diesel by mistake or one you reach a speed above 40 mph, that number will change.My driver side afm lifter #7 started making a strange sound at 107k. I did the passenger side lifters at 79k 18 months ago. This time the lifter twisted and ruined my camshaft. I had to change all my lifters and camshaft. My mechanic did such a great job for $4500. The mechanic did not get my car dirty or break anything which is amazing. Now my truck responds better and drives awesome. I am also getting 32 psi after a hour driving. Before I was getting 22 psi.