EVAP pressure test
When testing the EVAP system at the service port using a pressure pump, does anyone know how much pressure to use, and whether or not the vehicle should be running?
Also, is there a recommended method to isolate the problem if a leak exits?
I'm getting a P0455, and I already removed and tested the vapor control valve. It was relatively clean, and worked fine when I did a battery test, so it doesn't seem to be the issue.
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