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Discussion Starter #1
Thought I had a leak. Put on a gauge at idle I have 18 inch HG and if I squeeze the connector to the gauge to make a tighter seal it creeps to twenty. I’m not sure what it’s supposed to be but between 18-21 seems like that’s not a huge leak or normal.

I have a code for mechanical brake vac pump failure. But the thing whirs on and off in vag com basic settings output test.

I have crappy city mileage, also cats below efficiency codes. I’m guessing that’s the root of it. I’m guessing I have clogged warm up cats. I wanted to rule out the potential mechanical pump hosing vac leak.


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