car running badly

[jed344]

today i went to start my car it stared ran very badly like it was missing then stalled. and continued to try to start it for an hour. when it started it would not stay running unless i have it gas i limped it home now. It will stay runing but when i rev it high like 6-7k itll start to break up and when it idles down between2.5-4k itll backfire like a srt4 does almost stall then come back to idle... any ideas what might be causing this?

mods
intake, catback, 1g bov ( yes its recirc) 255 walbro, FFWD fuel kit, fuel pressure at 43psi.

 

[97-gst]

mine was doing the same thing and it was bad wiring to my coil packs. Borrow someones obdII scanner and that'll probably diagnose your problem