93*Si*B20

Ok so over the week end i drove north four hours. About two hours in my car starts missing out, bogging down not wanting to run. kinda like a fuel problem, I had just got gas so figured it was bad and that was it didnt think anything of it. On the way back it did it again, right around two hours. Just for giggles i turned the key off while i was still driving, started it back up and it drove fine the rest of the way home. Any ideas???