I put a d16z6 into a 93 sedan civic, and the engine is throwing map sensor codes, o2 sensor codes and a bunch of others. The car was not pre wired so I ran wires for the vtec. Any was the when I use the 1.6L map sensor the cars idle bounces between 1500-2500. I have to use the 1.5L mapsensor which is on th ecars body and the idle is constant but really high. I found out this is happening becuase theres three more wires the cars bodies harness is missing which are right by the vtec wires, its missing pinout D21 -SG1 D17 Map( explains why) and D19- VCC1 My question what do the D21 SG1 and D19 VCC1 stand for, and also should I expectg to find other wires that aren't pre wired for installing a d16z6 ina 93 sedan.