Yeah i used to always fill up on ultra 93. But ive done everything except sea foam. This seems to be a common problem. Now heres something intresting when i baught the car the guy gave me 2 extra injectors and they were different brands but also i can see 2 of the injectors shells are cracked. Not the tips just the red shells. and my fuel rail also is not bolted on. But i honestly dont think my injectors could cause this hesitation problem but who knows at this point. Also on my intake i have stock intake and the plastic piece that kinda looks like a slinky almost, and that is closest to the throttle has a crack in it. Sorry dont know too many terms (hence slinky usage). Any information at all or experience or anyone that lives in new jersey that could help me is greatly appreciated.