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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

Fuel trim questions

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Old Jan 23, 2025 | 9:00 PM
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drewski1126's Avatar
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Default Fuel trim questions

Having some fuel trim issues on bank 2. I don’t understand why the temps on the catalyst are so much lower on bank two. Is this indicative of a false reading ?





Last edited by drewski1126; Jan 23, 2025 at 9:03 PM. Reason: No text
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Old Jan 24, 2025 | 7:21 AM
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Gumby22's Avatar
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From: Central Iowa
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When were these readings taken? The engine needs to be at operating temperature and idling in park to accurately assess fuel trims and converter efficiency.
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