so cleaned the egr, pcv, tb, maf, and what i believe is the IACV [black box to the right of the TB with a vacuum fitting and a connector, it mates into a small opening that exits into the intake] and the cat still wont truly start, i hit the key it cranks for a split second, catches, stumbles once of twice, and then goes tits up again.

still no codes.

any other ideas before i start throwing parts?