car starts but dies immediately - running out of ideas

[go240]

i did some changes to my redtop this winter - here's a rundown of the important ones:
cometic hg
arp headstuds
hks 264 step 1 cams
RAS
t3/t4
tial 38mm
650cc deatschwerk injectors
deatschwerk fuel pump hardwire kit
sard fpr
apexi power fc

now the car will fire (it sounds fine - all 4 cylinders, no missfires) but it dies almost immediately. the fuel pump shuts off after the car dies, so i don't think its that. it's not the MAF - disconnected it and it did the same thing. it's not the CAS, i moved it 180 degrees and it wouldn't even start so i put it back. my fuel pressure is set in the low 40psi range. i don't think it's a vac leak either - i put an extra boost gauge into the bov line and it goes down to -15 or so psi before it dies - if i disconnect a line it dies before it even gets to -5 psi. the tps is fine - the voltage is correct and changes as the pedal is depressed.
the pfc has been set for the z32 MAF and for the 650's (lagtime has not been set, i messed with it a bit but it made no difference)

i'm running out of ideas here. the car will run a little better the longer it sits between tries. it dies faster if you start with the gas pedal slightly depressed. if the car starts and you hit the pedal, nothing happens (probably because it dies right awayy)

thoughts? i just want to to the dyno