k to start i have a fresh rebuild with 1500 miles i just started boosting,only under full load it sputters/pops...i can give it 3/4 throttle while boosting and be fine,its just while the petals to the floor??? i have all emissions removed/greddy 720cc secondaries and a walbro..and rtek 1.7 .so i dont see how but it seem like its starving for fuel??? can a bad fuel filter do that? ps all 4 injectors are new...thanks jr...ps the timing is good s4t2

 

yes a bad filter can do that, why dont you see how much fuel pressure you get at the fuel rail WOT.... do you have an FCD??? what other mods?

 

plugs? R6725-11 ngk .