djyacko

Hello guys I have a civic 99 ex automatic I been having a misfire and slow acceleration for a year now but recently it got to the point that is so bad that I need to find a solution
When I took it to auto zone the computer showed misfire in all cylinders, random cylinder missfire p0300 and p1399, also gave me a transmission range switch code
I already changed the fuel filter, distributor, spark plugs,wires and also checked for vacuum leaks and still doing the same thing I would really appreciate any help