"I bought a MAP sensor and cable from Dynojet, and I don’t know how to wire it to the PC5."
The only wire that will be attached to the PC5 unit is the manifold pressure signal wire. This is a GREY/WHITE wire at pin position #4. This would be connected to the optional analog input of the PC5 wire terminal strip, which is the 2nd hole from the outside edge or the 6th hole if counting from the middle of the module outwards.
The power supply wire is a RED/GREEN wire at pin position #3. It needs to be attached to a constant 5 volt sensor power source. You can usually tap it into the 5 volt power wire of the vehicle’s stock MAP sensor or TPSs.
The sensor ground wire is a BLACK/WHITE wire in pin position #1. It needs to be tapped into a sensor ground source. You can usually tap it into the sensor ground wire of the stock MAP sensor or the vehicle’s TPS.
The Intake Air Temperature signal wire is BLUE/WHITE and in pin position #2. This wire would not be used at all and can be left disconnected.