Hi. So I got a 95 Escort the other day. Freebie!! It was running nearly perfect, and I'm a bass guy, gotta have it. So I installed my sub and amp. Nothing crazy. Single 10" with a Rockford amp. 8guage wiring kit. I've done the same thing in just about every car I've ever owned. The very first drive afterwards, the idle was pretty rough, and it's stayed that way. Not too sure where to start?