On a clog cat, why would it make the engine run lean?

Tiny
MIKELEE7772
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ON a clog cat why would it make the engine on that bank run lean? For all three have miss fire cly, and make that bank run lean?
Wednesday, December 22nd, 2010 AT 7:10 AM

1 Reply

Tiny
MHPAUTOS
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If anything it will run rich, may be the upstream O2 sensor is causing the ECU to lean it out due to a faulty signal, replace the bad cat and see what you get in the way of codes.

Mark (mhpautos)
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Tuesday, December 28th, 2010 AT 2:47 AM

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