i bought a 91 toyota pickup recently for a parts truck and ended up taking the head pipe off of it because it was in much better condition. i couldn't get the O2 sensor out of either of them( this being a problem because the plugs dont match) so i hard wired the 91 sensor into the 92 harness but the check engine light now comes on, i get a little bit of black smoke and (from driving other 92 pickups) it doesnt have the power it should. does anyone know the correct functions of each of the wires so i can match them up better???