I changed out the spark plug wires on my car, now the engine knocks.
You may have the ORDER correct, but the STARTING POINT off by one plug! If you can find the timing mark on the crankshaft, place it in line with the timing indicator, and that should make the rotor (under the distributor cap) point to plug #1. If it looks way off, like 180 degrees away from plug wire #1, rotate the crankshaft one full turn, and recheck where the rotor is pointing! If the knocking problem persists, there may be a problem with the timing belt or chain which drives the distributor at 1/2 the speed of the crankshaft. That would explain the smells because the valves would be open at the wrong times. Caution! Pistons can hit valves that are open at the wrong time! Things can BREAK under those conditions!