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Code P0103 truck has no power, it will not accelerate and exhaust smells rich?

Tiny
JEFF HATCH
  • MEMBER
  • 2002 CHEVROLET SILVERADO
  • 4.8L
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I have replaced everything ie; sensors, coils paks, injectors, plugs and wires, mass air flow, MAP, fuel pressure regulator, TPS, and knock sensors. The previous owner replaced fuel pump and filter. I keep getting p0103 mass air flow circulation low code and engine misfire code. When we tried three different MAF's. What should I do next? Please help!
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Sunday, July 10th, 2022 AT 5:22 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,310 POSTS
Hi,

The idea that it has no power, and the exhaust smells rich, have you checked to see if one of the catalytic converters is clogged?

Do me a favor and look through this link. See if it mirrors what you experience.

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

If you look at the attachments below, they provide the diagnostics specific to the code. Take a look through them and let me know if you are comfortable performing them.

Take care,

Joe

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Sunday, July 10th, 2022 AT 11:47 PM

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