I agree, that is not normal. Probably injector cup issues as stated above.
96 F-350 CC Dually
300/100% B codes, Stealth dual pumps, H2E, BTS trans, ARP head studs, Comp 910 valve springs, Tyrant Tunes To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
6.0 IC, Fuelab electric fuel pump, NAPA 6637 air filter, ITP Overboost Annihilator, AeroTurbine 4040XL