ok, here's the deal. I did an engine transplant in a 97 civic DX 2dr. put in a 98 D16Y8. got the ECU but not the harness, so I ran the VTEC wires seperate. It turns over great, but won't start at all. Got new plugs and wires, but the plugs were bought for the non-vtec motor. also, the sensor that's on the backside of the intake manifold(3 wires, close to the TB side) isn't hooked up and we don't have any of the O2 sensors hooked up(actually not there at all) I didn't think any of that would cause the car to NOT start, just maybe run rough, but I don't know. Any help is appreciated