I did a b16 swap into my 90 crx dx and the IACV was throwing a code so I fixed that and then drove it for a while and then the knock sensor was throwing a code 23 so I switched the wires for the knock sensor in the plug and then put it in and drove it for a while and no CEL so thought it was ok... but then when I went for a ride again the CEL came on... anybody have an idea?

 

could be a **** knock sensor....

 

make sure the sensor itself is tight..and make sure you have good connections at the plug and the ecu.. nuttin more than that

 

U swapped the wires?? There is only 1 wire... are u sure u have the correct plug on there?