CCF5000

Something weird happened when i put my new pump in everything went smoothly but a couple of days after the pump install the car started acting funny like when i would start it up sometimes it would bog down and i would have to rev it a little to smooth out the idle. The fuel pressure i checked before the pump install and had it set to like 41-42 psi vaccum line disconnected. I checked it today and it was way too high imo it was at like 44-46 vaccum line disconnected and it was about 38 psi with the line on. I don't think the 255lph pump would have changed my fuel pressure would it? I set it back to 41 with the line disconnected until i get my tune.

grumpyphillips

Have you checked to make sure your FPR is working properly? Have you checked the injectors?

CCF5000

I would hope the fpr is working correctly lol its an adjustable holley one i bought two weeks ago so its made by a pretty good company i hope lol.
I tested the injectors with the actron ford scanner cylinder balance test.

92hatchLX

Did you tighten down the lock nut for the AFPR??

CCF5000

yea we snugged it up ur not supposed to really have it down bolt breaking tight but it is snug i sprayed the intake with carb cleaner around the whole thing so it doesnt have any intake leaks.

92hatchLX

Did you set your fuel pressure when your old pump was weak?

CCF5000

yea i had it at about 41 psi with the line disconnected