Misfires are detected by one of two methods. One is primary circuit voltage threshold and ringing in the voltage as it lapses, the other is by changes in the rotational velocity of the crankshaft.
A low cylinder does not fire with the same force as others and the velocity of the crankshaft changes across the duration of the cylinder in question on its firing time.
Your going to have to do a valve job to fix it.
If the state does a tailpipe emissions it will fail miserably...every time.
The MIL wont go away until the mechanical problem is rectified.
BTW ... have you checked the valve adjustment to make sure there arent tight ones?
Fixing the car right, will give better dependable service for longer time to come.Just a thought.
Fact is stranger than Fiction