ok i just put my 91 ls motor into my 89 crx dx now it is having trouble starting, and when it does it stutters and when you go to give it gas it shuts off. what could it be??? my ecu is throwing a code 14 i think it is a (IAC) but not sure i had another one and put it on but same outcome but it could also be bad. the car is obd0 so maybe you guys could help out any advice is good .

thanks for your time
ricky