car is a 2004 pontiac sunfire
well took my car to get tuned on hptuners today only to find out we cant tune it good at all, i have 32lb injectors and a fmu on stock fuel pump and stock map, the problems the tuner said i had was the fmu disk may be way to high of a ratio because i need around a 6:1 and it probably has a 10:1 he said i could ditch the fmu get a 2 bar and a waldbro pump, the main problem he said was the fuel pump was dead heading,
now my question if i get the 2bar and ditch the fmu wont my stock pump be fine? i mean what is the stock fuel pressure regulator ratio? 1:1 ? or not? also what is stock fuel pressure set at?
answered you on another forum.
well the main reason for the 2 bar is to adjust the tables and let the injectors compensate instead of the fmu. and the fmu deal he didnt really say that but i got the fmu from a friend and he has no idea what disk was in there he guessed it was a 6:1........ i would like to ditch the fmu and just use a 2bar tune and leave fpr alone so i can leave the stock pump in there
