W.T.F ?

There's lots of good advice here.
Why did you change the wires in the first place?
Unless they were old and dirty or had continuity issues or if the car didn't run good with them before, then why bother with the expense and hassle of changing them?
I would put the car back exactly the way it was before and see if it has changed since then, and if it has, then you need to focus on the new problem.
This might just be a case of what happens if you fix something that ain't broke..........
(Nice sounding car BTW)