hahahaha someone spends all that time putting an engine into a car and doesn’t think to check the battery? I hope the person that did it for him didn’t tell him that he didn’t know what it was.
This sounds like Battery or Connection. Simple fix. Thats one of the most likely things to forget when doing an engine swap. Sometimes tightening the Positive lead on the starter is forgotten. OR, the amount of time it takes to do an engine swap is just enough for a weak/dying motor to drain out. Especially when people like to bump the radio to make the time go by quicker when they’re doing the swap.
A place to TUNE it… Prolly JDM Imports -> OniJDM
The most active vendor on this board that seems to have a pretty good attitude.