OBD1 code tricks for 93 Beretta

A guy I work with and myself recently worked on someone else's car. After everything was put together, the service engine light was on. The Plenum was taken off to check the injectors and reinstalled. Autozone said the code was the MAP Sensor or vacuum leak. As far as I can tell, all vacuum lines were reconnected. Could the sensor just go out like that? Also, someone I know told me a trick. Using a piece of wire, stripped on both ends, put the ends in the cars computer on the two upper right sockets. Are there any other tricks I can do myself? It is a 1993 Beretta.3.1

Thank you for any help.