i have gsr...je pistons..9:1 compression and eagle rods...310cc injectors..and stock FPR. and it seems like at low rpms im missfiring and backfiring i have a fields SFC. what could be causing the missfiring..could it be dumping to much fuel. and my car is not dyno so teh fields in turned off.

 

Why the **** do you have those 310s in? go back to stock till you turbo. You're dumping too much fuel. I **** ITR doesn't even have that big of injectors.