We just put a chevy 350 in a 89 Formula and are having trouble keeping it running. It will start if you have your foot to the floor, but runs rough and will die when you let off the gas. It has throttle body injection, No error codes are showing and we are stumped as to what the problem is. Any suggestions would be great.
Thanks!

 

Welcome to the boards. You might want to start by checking all your vacuum hoses and connections. They're pretty easy to break and/or overlook and, it sounds as though one is leaking.