2014 mustang.
CAI.
long tubes.
Boss 302 intake.
BBK 90MM throttle body (I know)
ran great with this set up.
added:
stage 3 NSP comp cams.
checked the data log and had bank 1 wide band floating around 1.5-2.0 and bank 2 around 1.0 after it warmed up (30 seconds of it being online) then ran like crap. AFRs mimicked each other exactly during this time going from lean to rich.
customer changed both O2s with NTKs. now WB read more normal and the car runs much better but bank 2 is now super rich -20+ only at idle and bank 1 goes lean. after the o2 change now instead of mimicking each other they are the opposite. this is only in Idle when on the throttle it smooths out and has much better AFR readings.
bank 1 is usually lean and bank 2 is usually rich. customer states o2 plugs can not be switched its to far away to do so.
I do have permanent pending codes for misfire cylinder 5, 6, 7 and 8 (bank 2).
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