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Would the oxygen sensor or EGR valve make a 1997 Chevy Astro van run rough and backfire?
Wiki User
∙ 17y ago
yes i could make it run rough. not getting the right air fuel mixture will cause a car to run badly.also check the timing to see if it is off.may need to replace timing belt or chain and gears.
Wiki User
∙ 17y ago
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