Stock injectors and fpr. Not sure about pump. I bought it as is

 

Could this high fuel pressure be causing a random miss? If i have stock injectors and fuel pressure regulator, what could cause the high pressure? Thanks in advance for the help.

 

I have racetronix pump and hotwire kit and stop fpr and im at 50 but my tune is setup around that pressure for my larger injectors. My guess you may not have stock pump and may have hotwire kit also. If your tune isnt in line with your high pressure I would guess would be a problem(might not be the problem). Id look at a couple plugs that are easy to pull til someone gives you better advice than I have.