I watched your videos and it doesn't sound too unhealthy to me other than obviously the fuel pump needs to be turned back down to get rid of the smoke.
You say misfiring and low power? When and how does it misfire? At idle, under load, ?? Is it a steady miss like a weak or dead cylinder or is it an intermittent stumble or what?
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86 745 D24T/ZF 345k lifted 2.5"
83 764 D24T/M46 155k
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