Coil Packs and Spark Plugs
I know this has been rehashed over and over on the forums, but I have a new situation (I think). I had the spark plugs replaced 5000 miles ago, all new Motorcraft plugs. This weekend I had a coolant leak on the engine, blew coolant all over the engine. When this happened, a misfire appeared. I assumed it was from coolant getting on one of the coil packs, but the check engine light didnt come on. My mechanic could not get a code to pull, but found a misfire in Cyl 2 while testing, so I replaced that coil pack. That didnt fix the issue, so he recommended I replace that plug again.
Heres the questions. First, should I replace a 5000 mile old plug that I have driven for 200 miles with a slight misfire (not misfiring all the time)? Would it already be fouled and need replacing? Second, if it is the cam position sensor, where is it located and how hard is it to change?
Also, anyone else have any other thoughts?