P0301 no other codes replaced head gasket compression went from o to 65. Plus other new parts from rear cyl head, throttle body, so on and so on. fuel and spark good. Just compression in #1 (185,190psi other 5 cyl). Wet test no difference. Could I have a bad Hydraulic valve lifter. How to test. Not sure what else to do. Starts right up no issues few mins idle all goes down hill sputter flashing engine light thick exhaust smoke. Any help or suggestions
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