So I thought the car was good to go. I literally drove it 20 miles and call the owner to come and get it. He paid me for my time and left and then my phone was ringing. He called and said it was miss-firing and the check engine light flashing. I told him to bring it back and his ride was still there. Apparently we have more wires messing up since I can tug the harness and affect the missfire. Updates soon!