I remember spending hours hand wax numerous vehicles.. The TW Ceramic wet wax is probably the best jump in results for the time spent I have done since getting a DA
Mine is still high just a bit over the top hole.. Purchased an 8yr 100k Esp plan just going to change it every 5k.. Just drive it an not worry about it
During the troubleshooting of my truck they asked if I had any hesitation as that would point to an injector issue.. I had not had any and the conclusion was to replace the HPFP
Best of luck