I've treated myself to a brand new 8 year old car that has its own brand new problems.
vitals: 2005 Outback 2.5 4eat
The car ran perfectly two days ago and then some sasquatch (me) was prodding around under the hood looking over the new car. Then the car sat for a day and today it's running as rough as an old tractor and throwing a p0302 misfire code.
I know this is a cylinder 2 misfire so I pulled plug #2 and it was in excellent condition. Plugs and wires are at LEAST 30,000kms old, maybe more. I've already ordered new NGK replacements but they aren't here yet.
I cleaned the MAF just for fun and reset the ECU. The code cleared briefly but the rough running was still present and the p0302 came back within a minute or two. This time while watching it run with the hood up I noticed a pronounced SNAPSNAPSNAPSNAPSNAP sound coming from the area of the coil pack. The snapping noise speeds up with RPM...
Am I hearing my spark jumping from a damaged coil pack to a nearby ground? I'll watch it again in the dark later to see if sparks are evident but I'd sure like the group opinion on this one.
PS. It IS possible that I poked at, leaned on, or otherwise molested the coil pack while I was looking around at the motor the other day.