ok well i bought an 88 crx with a swap and i have a stock ecu for the crx but the swap was out of a 98 civic and it is supose to be v-tec but has a diffrent valve cover. but he said i need to get the right ecu to make the v-tec work properly would it fuck my car up if i didnt change the ecu for a little while or would the ecu even change the performane a whole lot.