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Truck idles fine but no power and stalling?

Tiny
MARIO82
  • MEMBER
  • 1991 CHEVROLET S-10
  • 4.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 200 MILES
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.
Wednesday, August 24th, 2022 AT 6:41 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 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.
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Thursday, August 25th, 2022 AT 12:43 PM

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