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How do you tell which cat on a jeep wrangler went bad as there are two of them a small one?
Wiki User
∙ 9y ago
You can put the vehicle safely up on jacks on all four corners, have someone run engine at a constant 2300 rpm's for aprox 10 minutes or more (cats have to be hot), slide under the vehicle while it is running and use a infrared point and shoot temp gun, take a reading just before and just after each cat, a good reading would have the cat 150 or more degrees hotter coming out of the cat, (example-450 degrees F before the cat and 600 degrees F after the cat). If the readings are the same or reversed you probably have located the bad cat. I would be curious to know what the code(s) are, assuming the check engine light is on.
Wiki User
∙ 9y ago
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