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Yea these plugs have been in the motor for a year or so. All 4 look EXACTLY like this. I'm thinking of just changing the o2 sensor and seeing if it helps. But yea by the look of the plugs, def not rich conditions. Someone did tell me they look like a little bit of pre detonation going on though. I'm going to pressure test and see how that goes. Yea I've been skipping out on buying a adjustable fpr and gauge haha, should really get on that >_<.
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