alright so i just installed a 70mm FRPP throttle body, granetelli upper intake plenum, and a 1/2" plenum spacer. car will crank, get up to about 1500 ish rpm as usual then it just stumbles and dies. feels like a vaccum leak from HELL. only thing i can think of is that when i was putting the EGR valve back on, one of the bolts broke into the new plenum so ive only got one bolt holding on the valve.