2 questions:

First off, for the injector harness there are 2 plugs that are brown. Was wondering if anyone could tell me which cylinders the 2 brown plugs go to? I think I may have 1 and 2 harness plugs switched, but I can't tell cause it runs horribly either way.

Secondly, what would cause a cylinder #4 misfire code? The truck runs, but really aweful. Alot of engine shake at idle and light acceleration, exhaust sounds horrible also. I've replaced injector, checked for fuel and spark, replaced plugs and wires, checked compression and timing, which are just fine. Could coil, distributor, or distributor cap be the culprit?