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Q:

a misfire on 3 cylinder on 1997 Chevrolet Astro

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
changed spark plugs and wires still misfire
(1) Answer
check for spark at # 3 plug, and take a compression on # 3 and one of the other cylinder and compared it. shouldnt be less then 20% different. finally check for fuel on #3 is that a single injector? might have a bad injector on #3 cylinder.