5sfe engine harness help

[socal mr2]

I just bought an mr2 and was going thru everything and fired it up when i noticed it was running crappy so i decided to ceck everything out and i have noticed the previous owner had chopped up the engine harness and im pretty sure the wires are not connected right i cant seem to find an engine harness except for ebay i was wondering if thier was another harness that would fit it mabey a camery harness or something that or mabey and engine harness diagram tried looking cant find one can anyone help me out i realy would rather replace the harness is thier an alternative harness? the motor is a 5sfe 5 speed n/a it has brand new stock 5sfe ecu but harness looks like little kids worked on it when i move around some of the wires it runs better.... help please