Truck idles fine but no power and stalling?

1991 CHEVROLET S-10
200 MILES • 4.3L • V6 • 2WD • AUTOMATIC
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MARIO82
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  • 1 POST
Truck idles fine but when put in drive and try and go now power stalling and rough idles. I changed plugs wires, cap, rotor, MAP, coil, and all sensors. No leaks, I’m clueless.
Aug 24, 2022 at 11:41 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,267 POSTS
Yep, these trucks had a problem with a clogged catalytic converter. This guide can help you make sure this is the problem before you replace it:

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

You can loosen the head pipes to see if the problem goes away, let me know what you find.
Aug 25, 2022 at 5:43 AM
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