Dallasneal

Hi new to the site. hopefully you guys might have an idea what’s going, so I have done and engine swap on my 91 pick up and dropped in a 22re from an 87 it all went well till first start up nothing happen didn’t start, so tinkered with it got a new efi relay, fuel filter when I found out mine had went bad, so now it will run only if I sit there with the key turn to on for a while then will run for 30 seconds and die or die as soon as I even think about touching the throttle
thanks in advance