missing on 1992 Chevrolet S10 Blazer

i chainged plug wires and plugs but it still misses but not as bad when it idles no miss but when you put it in gear and drive it misses on my s10 blazer

Asked by for the 1992 Chevrolet S10 Blazer
Dist cap and rotor could be suspect. Remove and inspect for corrosion, moisture, cracks and burned up tip at the rotor. Also, look for vacuum leak that can cause a lean misfire.