I know there are tons of misfire threads, but never have I seen the issue I'm having now, and it's so weird that it's actually somewhat entertaining. What started off as a misfire under load (no CEL) has gotten gradually worse to where I finally did get a CEL (random multiple misfire), but part throttle driving is totally unaffected. So far I've inspected the plug wires for damage, and took the metal shields off the spark plug boots. I haven't bothered checking the coils or ICM yet, because I should be getting a set in the mail tomorrow, so I'm just gonna swap it all over. I still need to check the plugs as well. PO said they're new, and they're AC Delcos, but I don't know which "flavor" he used, or if he bothered gapping them. Here's where it gets weird.... driving to work today, all of a sudden I was getting alternator noise through my speakers, and the stereo wasn't even turned on. It would get pretty loud as I stepped on the throttle, then it would cut out and the car would drive as normal until it happened again. The misfire didn't really get any worse during the "noise storms" but if it did, I probably just could hear it over that noise. Maybe a rectifier in the alternator blew out? I wish it wasn't so cold out so I could check all these things properly without losing fingers to frostbite.
