I got a b20 in my 96 civic and I'm trying to run a p75 ecu but it doesn't seem to want to keep the car running it starts up fine then shuts off could it be I'm using the wrong jumper harness or what can be the problem?

 

*FACEPALM*

wrong ecu buddy. unless it's chipped. if it's chipped, then you need to TUNE it.