| Thanks for the detailed follow up. I got new spark plugs and am going to be replacing all 6 tonight. It's running rather rich, the exhaust smoke only comes from the driver's side when it does. This is the same side as the new fuel injector and the PFR5-11B spark plug. This drives me to assume there is an issue with it. I'd rather not sit through another entire plenum pull for another injector unless I have to. I know it's really a shot in the dark with this spark plug, but I read another issue online that was causing a similar problem to another person's Z till the plugs got changed. I did check the single PFR5B-11B last night and it wasn't fouled. List of known mods Chipped ECU by Jim Wolf for 14psi Underdrive Pulleys Full Borla Exhaust Stage 2 Clutch
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