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Q:

rough idle/ bucking during excelleration on 1990 Nissan Sentra

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
idles rough and jumps or bucks during excelleration
(1) Answer
Sounds like misfire at the plugs/wires/cap/rotor, etc. How old are the tune related components? Could be other components but this sounds likely.