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I have a misfire on my '97 4.6L F150. I took it to auto zone and found code P0304 (misfire on cylinder 4).
1) Is cylinder 4 the back one on the driver's side or the passenger's side? Auto zone said it was on the driver's side (that plug and wire looked fine / no moisture), but I thought number 4 was on the passenger side.
2) What should I be looking for in troubleshooting the problem? I changed the plugs and wires at around 105,000 miles and have 112,500 now. Should I be looking for moisture? The coil pack? Or should I just take it in to a service center?