Cars, etc.

[beigledog]

The guy at Advanced Auto Part suggested that I switch the two ignition coils in their places on the module and then hook the computer up for codes again. It still came back with cylinder 1 misfire. He suggested that I replace the module, but at $120 I'm not going to replace it unless I know it's going to fix the problem. Any other ideas for my rough idling and poor gas mileage problem (it's probably gone from 27-28 mpg to 20-21).