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

1 Answer

  • Anonymous
    5 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.

Still have questions? Get your answers by asking now.