How to Test a 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


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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.