Black box of tricks has a MAP sensor, Air-Temp and other late 80's gizzmos. Just make sure none of the vacuum hoses are cracked or broken.

There is a air valve/solenoid on top of the inlet manifold, between Cyl 2&3 with a 2 wire plug going into it. There are 2 rubber hoses, one comes from the airbox and another goes into the inlet manifold jsut before the cyl head. You will need to take it off and clean the solenoid out with some carby/throttle body cleaner.

Also, on the Cyl 1&2 Carb closest to the passenger strut tower, there is a little 'cap' secured by 3 screws... Undo the 3 screws and make sure the little diaphragm is not damaged underneath.