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Misfire bank 2 or cylinder 2?
Does it misfire at idle? Any rattling or dieseling noises at idle?
If it does not misfire at idle and is quiet I would check exhaust back pressure on that bank next.
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OK then it probably either jumped time or the phaser is stuck on that bank or there is an oil pressure problem to that phaser.. Do you have a scanner that can display VCT error correction data?
The PCM commands the phasers a certain degrees then monitors the position with the cam sensor. It then displays this data in a pid called VCT error correction. Its the difference between commanded and actual.There is one pid for each bank. It is displayed in degrees, zero is perfect. Usually with a concern like yours I see error correction 10 - 15 degrees on the bank that is misfiring. I usually see 160 - 180 compression in these when they are good.
It will move on acceleration and deceleration. If it moves at idle without touching the throttle then that's a problem. ARe you sure both banks were moving the same direction? Often the bad bank will go negative and the good bank will be biased positive at the same time. With this year engine and those miles before putting any $$$ into engine I would check oil pressure hot engine with a manual gauge, it should be 25 or better in gear at idle fully hot engine. If lower or spiking around then suspect excessive crankshaft endplay (very common on these) If oil pressure steady and above 25 then next I remove valve cover from bank that is missing and pull a few cam caps and inspect surfaces for grooving or galling (also very common). If either of these are bad then its engine time. I'm signing off, will check back in the AM if you have any follow up.
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