The MAP sensor connector has only 3 wires. It's generally located atop the throttle body, though I think the 92-93 D15B7 engine had the map sensor on the firewall.
Huh. Wish I'd thought of that advice.
Just kidding, RonJ. I commend you for taking the time to walk him through all the diagnostic steps. It really COULD have been something else.
It would be wise to post the head and block codes stamped on your engine. I think both codes can be found on the side of the engine facing the radiator. Post pictures.
The colors of the MAP sensor wires tell you that the wire harness is for either the D15B8, D15Z1, or D16Z6 engine.