I need serious help from anyone who nows Celica's, Not sure if this is the right thread to post this. Options

[JuMPiiN]

So im in serious need of help with this car. Apparently whom ever i bought it from put in a COMPLETELY different engine and put a 2.2 valve cover on it or something. Anyways my cars been in the shop for a good month now with me and the mechanics trying to figure out what is wrong with it. So we replaced the dizzy, plugs wires basically everything even tryed a new harness still does the same thing!!.. So we took it to Toyota and they even told me that my car whom ever did the swap was a idiot and cut and spliced wires to grounds, other hot wires ext. There are so many wires that are cut that dont even go to anything its just a complete cluster F***. I REALLY dont want to sell my Celi, so my question is If i were to buy a BEAMs like i want that comes with the entire harness, trans, ecu, air box, sensors, ext. Would this fix my wiring problem !? I d ont want to buy this engine and it still does the same thing i love my car but if i cant figure out whats wrong with it im going to part it out or just sell it as a whole.

PLEASE someone help me im desperate. ! I love my car and i dont want to get rid of it ! .