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Your 98 Chevy s10 fails smog test have replaced everything but egr valve and oxygen sensor what else can you do?
Updated: 10/27/2022
Wiki User
∙ 9y agoBest Answer
A faulty EGR valve can cause a 98 Chevy to fail a smog test. The oxygen sensors should also be tested as they can also cause a 98 Chevy to fail a smog test.
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∙ 9y agoThis answer is:
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Earn +20 ptsQ: Your 98 Chevy s10 fails smog test have replaced everything but egr valve and oxygen sensor what else can you do?
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