misfire in cylinder 3

i have a 97 saturn sl. it burns oil, blue smoke, hesitates, oil in airfilter and is throwing a code for misfire on cylinder #3. i have changed spark plugs,
wires, both coil packs, fuel injector for #3. i was told it could be a bad pcv valve so i unhooked the hose from the pcv valve and started my car, there was no suction or noise indicating it was working. could all this be caused by a bad pcv valve or is there anything else cause im stumped. please help and thanks
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