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If you know the distributor housing is made by Honda for your engine, you may be able to solve the problem by just replacing the ICM. They are notorious for causing misfire problems. I recommend replacing them every 125,000 miles or 10 years, whichever comes first. Still, it's best to replace the coil and rotor at the same time.
I got a brand new distributor and put it on and it done the same thing I'm lost it showed a p1399 p0300 304 302 301 misfire on all 4 plugs I'm so lost if u have any ideas would love to here them