drivability problem 86 gn

[fastblackcar]

New player here ,well finally got this thing together, new turbo, 42 # inj, ported heads,rjc plate,100# springs,other small mods, when i start off a little hard or try to power brake when it starts to spool up it pops then stalls,starts back up, i dont yet have a scan tool (next) any ideas,has code 24 speed cable broke last fall but never seem to make any difference before, new to these gn ,kind of wish i never took it apart now, cam sensor timing?