wiring for iat or map sensor

[kozakievichsteve]

i have a 1991 240 sx that had the wiring tore up under the hood. i have repaired everything except the wiring to the iat or map sensor. the sensor that is bolted right to the air cleaner. there is a black wire, white wire, and a black and white wire. it has four prongs and i don't know which wire goes where. i have three different wiring schematics and they all have different diagrams. after trying the different wirings the car idles but will not rev, or revs but won't idle. please, any help would be greatly appreciated.