the driver side has the PCV. replace it and make sure those vac hoses to it are good. also be sure the opti vac lines are good .Just changed plugs. drivers side all sooty black no big build-up of anything. Pass. side all reddish brown no build-up of anything. All 8 were dry. This is my 1st plug change. It had Bosch plat's in it. I put AC Delcos. I don't know why one side would be different. Pass side is normal IIRC. So what's up with the drivers side?
PITA job. All from the top, taking my time as I can't stay bent over the fenders like I used too...LOL. 3 hrs. Jacking up the car & taking the wheel off ??? I don't think so. You do have to work more by touch than anything else. Also donate a little blood to the grease Gods, but that's nothing new ..lol.
Any ideas on the plug difference from side to side guy's.?
check the passenger side also for cracked hoses. a vacuum leak can throw off the PCM fuel mixture control.