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I hate to say this but these are signs of failing IMS. Bank 1 adjusts off IMS end of shaft. Looseness in the bearing will cause this deviation. Wear in the bearing will cause the debris in filter. The main chain can also get loose and transmit some timing error to Bank 2 but it will be less.
I haven't seen the car so get another opinion. Removing the pan will give a better idea of how much debris is in the motor and what type. Pull the scavenge pump bank 1 and move the cam manually back and forth to check play in the chains.
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2003 Black 986. modified for Advanced level HPDE and open track days.
* 3.6L LN block, 06 heads, Carrillo H rods, IDP with 987 intake, Oil mods, LN IMS. * Spec II Clutch, 3.2L S Spec P-P FW. * D2 shocks, GT3 arms & and links, Spacers front and rear * Weight reduced, No carpet, AC deleted, Remote PS pump, PS pump deleted. Recaro Pole position seats, Brey crouse ext. 5 point harness, NHP sport exhaust
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