Why does my 95 neon misfire at low speed but runs fine at high speed. on 1995 Dodge Neon

I put new spark plugs,wires,coil, o2 sensors, checked for vacuum leaks. The injectors are the only thing not checked

Asked by for the 1995 Dodge Neon
Vacuum leak or low compression on one or more cylinders due to valve seat problem is my guess.