1999 - 2006 (GMT800) Section for all discussion related to the 1999-2006 Chevrolet and GMC trucks.

cath converter question

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Old Dec 17, 2019 | 3:38 PM
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I bought a temp gun. pipe before cat is 325 degrees front of cat is 240 outlet is 200 degrees. I dont think this is what it should be.
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Old Dec 17, 2019 | 4:17 PM
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should be hotter out if its redox reacting.
are you getting po420 p0430 dtc
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Old Dec 17, 2019 | 6:57 PM
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make sure the pipe is the same thickness (like no coupler or anything)
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Old Dec 17, 2019 | 8:01 PM
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i wouldn't condemn a cat based on heat gun results. there would have to be another problem.
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