help on a crx 1.6si swap to 1.6 vtech

i have two crx's right now. I took the si motors out and put in a 1.6 vtech in both off them. The problem is i had to wire the newer distriputers up to the si wire harness and used the old 88-89 si ecu. now both of them are doing the same thing,they will start but die afterwards. like the wiring or ecu is messed up.