I was wondering if anyone can help me with some questions that i have. I swapped a 96 accord ex vtec engine into my 90 accord and i used my wiring harness and distributor and my 90 ecu on the 96 engine. Now after everything is hooked up i have a knocking noise coming from my engine and i know that my knock sensor is NOT hooked up...is that the knocking that i am hearing? if so what do i have to do to fix this problem? do i have to have a 96 ecu in there or can i run my 90 ecu with a knock sensor? Another problem that im having is my rpm's will go up to 4500 and then it will cut out and i cant go any higher then 4500 rpm's what is the problem with this? is this the knock sensor as well? Please someone help me with this...??? Thanks!