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International Automotive Technicians Network
Re: Pursuing a P0420
Posted to Technical Discussion Forum on 9/12/2022

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I put that 5-6 PSI in there on purpose, sir. So that I could inspect for leakage via soapy water bubbles. Jammed a blow gun in the tailpipe with a rag and hooked a pressure gauge up to the primary AFR... Login to read more.