Hesitates to accelerate and there is black smoke when I floor it?

2008 GMC YUKON
179,203 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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HORTONO
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Don't want to take the gas all at once when at a stop light or sign seem like it wants to cut off and it ride rough. What do you think the problem could be?
May 3, 2024 at 5:08 AM
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STRAILER
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Yep, this happens when one of the catalytic converters goes bad, but to be sure please go over this guide to confirm the issue:

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

This car does not have a fuel filter FYI. Here is a video of the catalytic converters being changed out to help you see what needs to be done if they fail the test.


https://youtu.be/CORe9JyrexI?si=ArkojwvJERJxK5LG

Please go over these guides and get back to us.


May 3, 2024 at 12:45 PM