So a few months my car starting sputtering, I figured the wires of my coil pack were on the wrong way, so I spliced one of the connectors, still had the problem, went to Autzone, says 4,5,6, misfired and coil pack. The coil pack are new, changed them last year. Now I was told the black wire goes on top pin of the coil pack connector, and now car is acting crazy.. can someone please help? I'm going to change the spark plugs today