How to Test a Clogged Catalytic Converter

When a catalytic converter is clogged, it can cause multiple driveability issues. Common symptoms are lack of power under acceleration after the engine is warm. The engine can run rich, accusing multiple misfires and stalling. Here are some tests you can use to prove that the catalytic converter is clogged. A vacuum test and a pressure test are good test to gather evidence. watch until the end to see the results after the repairs. #P0420 #catalyticconverter # Time line: 0:00 Intro 0:41 Hooking a vacuum gauge 1:27 Vacuum Test at Idle 2:05 Vacuum Test at 2500RPM 3:27 2nd Vacuum Test at Idle 3:54 2nd Vacuum Test at 2500RPM 6:20 Exhaust Backpressure Test 9:40 Performing an Exhaust Backpressure Test at Idle 10:20 Exhaust Backpressure Test at 2500RPM 11:30 Vacuum Test/Exhaust Backpressure Test 14:00 Borescope Inspection 15:23 Thermal Imaging Testing 17:28 Second Catalytic Converter Inspection 17:53 Verifying Repairs After CAT Replacement Disclaimer: The content of this video is available for informational and educational purposes only. I cannot guarantee against improper use or unauthorized modifications of this information. MR. DIAGNOSTECH assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not MR. DIAGNOSTECH.