1997 Chevrolet Astro Q&A

1997 Chevrolet Astro Question: a misfire on 3 cylinder

changed spark plugs and wires still misfire -
Answer 1
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. -