I just installed my spark plugs, OEM NKG PFR5G-11, a couple of days ago (part of my 100k miles service) and today I noticed an occasional miss when the engine was at idle. I don't feel the missing while I'm driving (yet) so my first impression is that it was one of my coil packs. I talked with DaveB this afternoon and he thinks it might not be the coil packs so we're not sure what the problem is. Does anyone have any ideas?????

 

Hm....im thinking its one of the coil packs. I remember i pulled one of them out once (didnt twist, so the spring inside was stretched) and then moved from the contact at the base part. Car idled like a '67 V8, mean.......but drove like 5h!t. Just try and recall if any were particularly hard to get out....and check that one first.