'02 Cyl 3 Misfire, rough idle, "pull back" on acceleration
Not familiar with Ford cars, but trying to help a friend. '02 6cyl Cougar --Cylinder 3 Misfire code came up. (Probable causes: Ignition coil, wires, plugs, sensor, fuel injectors). I pulled the #3 plug, didn't look fouled. Checked all the plug wires, coil connections/wires, and borrowed a new #3 wire in case that was faulty (related to the code). The new wire did not change anything. The coil pack was changed out a year ago..but I've heard that the coil packs DO have issues.
In the beginning you could only feel it misfire under acceleration. Just for some hope, my friend ran a bottle of Lucas Fuel Injector Cleaner through the tank. Now she says it has a rough idle, hesitates even worse on acceleration, and feels just "unsafe" to drive.
I don't want to just start replacing parts that may not solve the problem --adds up quick. The coil pack alone is about $60. Has anyone had a similar problem that can throw out a suggestion? Is there a way to test the coil pack?