Originally Posted by Kingtal0n

these engines are remarkably simple.

Fuel goes
maf -> ecu -> injectors

spark goes
cas -> ecu -> coils

The only places to really screw up here are
1. timing
2. maf related (boost / pressure leak or incorrect maf)

and of course there is always
3. general misc. (wrong ecu/leaking injectors/wiring related/bad fuel pump/etc) but these are more apparent