Hi, my truck was showing po308 misfire cylinder 8 did a compression test was leaking...did a valve job and now getting po300 multiple misfire had a bad 02 sensor change it still getting the p0300 code. did a live data check on it and seen the long term fuel trim was above 10% on bank1 sensor1. did a fuel pressure test and found when the truck is running its at 60psi and according to the specs it needs to be at 43-45psi. its in specs when not running. Any ideal what i need to check next?