Waste spark coils or not that kind of wear on a plug with only what was like 35k, is not normal. There is too much heat in the cylinder with plugs that look like that. Tip almost gone, white color screams heat and detonation. A dirty injector or injectors could be the cause. I say that due to the rich burning plug on the right. Do you have any fuel upgrades like 7th injector dialed in or larger injectors and tuning, larger fuel pump? If you have never done an injector flush with a high quality injector cleaner or had the injectors sent out and cleaned and flow tested it would be a very good idea.
I done care what others do and say or get away with but just bolting on the supercharger a driving away is a bad idea and not really the right way of adding forced induction. Any time you add more air into a motor you have to add in more fuel. The stock fuel system and ecu with 100% perfect/dealer fresh injectors and fuel pump can just barely keep up with a trd supercharger. Now add in an old fuel system and you can have lean issues, ones that may not show up as a misfire code or knock code or even on a wideband air fuel meter. Hope this helps in some way and dont think im being a jerk, this may be well known info to you.
Yes, it's all well known info to me. The truck does not have any fuel mods. However: it's had the supercharger on it for a long time with no fuel mods, and the way I drive it, i've never had fuel problems. I monitor AFR with the ScanGauge, and if I do get into the throttle, my AFR's are always a nice healthy 11.7. And I don't experience any pinging.
PS. I've built and tuned a custom turbo 2.0L SOHC Neon that makes over 400whp. Tuned completely by me, with standalone fuel and spark management. I kind of know what to look for when it comes to fuel management. And that's why I never invested in a pricey 7th inj kit for this rig....it ran great without it. But I don't drive the 4runner hard. That's what the Neon is for.
This code may be telling you something. Knock sensor codes can be from detonation being detected. That and the plugs says possible lean in those cylinders.
It is definitely not throwing the code because of detonation. The code popped on one day when I was idling in the driveway. Truck was running exactly like it always had. As soon as I'd clear the code, it would run great. The randomly within 2-15 minutes of driving (easy driving, like cruising or coasting at 25 mph) the code would pop right back up, I could feel the ECU pull all the timing, and it would run like crap. It's the wire harness or the sensors. It does have 220k miles on it. Now there is the chance that the bad plugs were playing into the issue....but I can't make myself blame the plugs entirely for a consistent P0330 over a 2-3 week period, and never a single misfire code in the mix. If it was the plugs causing the P0330, I have to assume I would have gotten at least one misfire code in there.
How can he be rich on some and lean on others? You mentioned both between your 2 posts.
Also -- did you not see steezemcqueen? He stated he has the same issue on the same plugs after 30k and supercharged.
The plug issue is actually well known. I just didn't realize it was so well known until I looked into it last night. If you want to run single electrode plugs like the IK22's, you won't get 30k out of them (usually).
But to be honest, even with the center electrode missing on 2 of the 3 drivers side plugs, they were still sparking just fine. I'm sure some more miles and they would have broken down and the porcelain would have cracked or the truck would have started running like it had bad plugs.
