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Unfortunately I only have a WB02 on one side, I haven't taken the step to swap sides yet. I didn't mention in my post, but I'm running a topfeed injector setup. I'm not sure how a leaking o-ring would cause it to run rich. It would have to be at the rail side, as the intake system is airtight up to 5PSI with a boost leak test. I suppose its possible I have a massive boost leak that is very repeatably exposing itself only under boost. Heck, given how it started all of a sudden that might be the most likely scenario. Maybe I'll pull everything apart and put it back together.
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