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A misfire on 3 cylinder

(1997 Chevrolet Astro)
in Hampton, VA on February 09, 2011
changed spark plugs and wires still misfire
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Popular Answer
on February 09, 2011
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.
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