I did a b16 swap in my 90 CRX DX and when I was all done it was throwing a code for IACV so I fixed that and drove the car for a few days and then it started to throw a 23 code for the knock sensor... so I switched the wires and then put the plug back in and it drove for a while and then came on... and now it comes on when the car warms up... what should I do?