I was looking at a 1994 BMW e36 318i coupe, with a 318is engine in it. The engine is in it, but the wiring loom isn't connected. The dash etc is connected, but the engine part of the loom isn't. He said he bought a 1.9 wiring loom with the engine, but was told that the old 1.8 ecu would work, but the fuel/air ratios would need to be remapped. I was just wondering if anyone had put a 318is engine into a 318i before, and how big a job is it to wire in something like this?