Hi all, since buying this car ive had nothing but minor issues that have been fixed relatively easy. Now im stumped.... i have a misfire(i think). At idle its constant but at highway speeds it tremendously smooths out but its still there and the power difference is noticable. The car idles very rough. Pulled wires off coil pack as it was idling and cylinders 2 and 6 didnt change idle and as i pulled off cylinder 1 the spark jumped through the plastic in the coil pack to the bracket. Checked all injector plugs and they are all plugged in. Does not sound like there is a vacuum leak, all hoses are connected have not got around to spraying carb cleaner to verify no leaks. Car is a 97 gt and has a new fuel filter (150 miles) new plugs and wires (150 miles) new intake manifold from previous owner. Crown vic upper plenum, iacv restrictor plate, k&n fipk filter. Just swapped green coolant temp sensor with a spare i had here as the conector broke off the old one. Any help is greatly appreciated.