Evap issue Jeep Registry
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Evap issue

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So I could use some help. 04 Grand Cherokee CEL light on for evap leak. While the car was on, there was a loud steady thumping noise coming from around the leak detection pump area near filler neck. I guess this might be a dumb question, but does the LDP make loud thumping noises when there is a leak or could it be a bad pump?


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