Code p0103 truck has no power, it will not accelerate, and exhaust smells rich?

2002 CHEVROLET SILVERADO
150,000 MILES • 4.8L • V8 • 2WD • AUTOMATIC
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JEFF HATCH
  • MEMBER
  • 1 POST
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!!
Jul 10, 2022 at 10:22 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,244 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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Jul 10, 2022 at 4:47 PM
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