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Assuming you mean EVAP and Cat, these are two separate problems. To come even close to telling you what can be done to correct the problems we are going to need to know what codes are set in the ECM. There are too many possibilities to just guess. Your local auto parts store can read the codes for you at no cost. Get the codes and repost.

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8y ago
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8y ago

You start by figuring out what's going on that's causing it to fail, then you repair as needed.

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Q: How do you get the eval and cat to pass for a emission test on a 2003 Lincoln LS drive over 500 miles and won't reset?
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