for the past 2 maybe 3 weeks i havnt been getting the same boost that i did befor. at first i was peaking at 22-23 psi for 2nd and 3rd gear and averaging 17-19 psi, now it seams that i peak at 16-18 psi and average out around 12-15. i had a scan done and no codes popped up, i checked all hoses and nothing seems to be outta the ordinary. i have the apr stage 1 on a 2000, have had the apr on my car since april and booste gauge since june. i can feel the difference than befor aswell when driving. any help or suggestions are much appreciated. thanks.

 

see if you can get a pressure test