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I agree w/ above. Damage is most likely already done. Low fuel pressure can damage injectors AND, if you have plugged filters for long, they can distort and pass contaminants through.
Also, the water block membrane on the OEM filter is ONLY on the primary filter.
Lastly, 50 psig w/ KOEO or cranking is still too low for my taste.
*Update* I finally broke down after replacing all 8 injectors (OUCH!) and took it to a shop. 30 minutes after I dropped it off they called me to tell me it was running and I could come pick it up... It seems the FICM had decided to kick the bucket. I was told that everything I replaced was about 90% necessary. I would like to thank you all for the wisdom you provided to me in this aggravating situation.