pluged up cat  convertor?

so if i remove both oxgen sensor on same side and car idles now does that mean that catalac convertor is plugged up?  im giving no check enging light

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  • Anonymous
    2 months ago

    Put a pressure gauge on the front O2 sensor fitting.  If pressure is over 3 psi with engine idling, the cat converter is clogged. 

    You can also check cat converter using a vacuum gauge installed in a vacuum line.  Rev engine to 3000 rpm.  Vacuum should drop. Release gas pedal. Vacuum should immediately rise.  If vacuum does not increase immediately, cat converter is clogged.

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