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Old 04-09-2013, 09:39 AM
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snrusnak snrusnak is offline
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you shouldn't need cats for it to run good. The problem is probably elsewhere. First thing is to see what codes it's throwing. If it's a downstream(rear/after cat) O2 sensor code don't worry about it, they don't effect performance only emissions. If it's an upstream(front/in the manifold) O2 sensor code that is likely the issue. Or maybe there's some other code. Write the code down and post it here. Don't let the guys at the parts store tell you what the problem is, they are usually wrong.
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