I had a 2013 Cadillac ATS with bank p0171, a lean code. I was certain it was a vacuum leak. I couldn't find the leak until I got this block. I found leaks within 2 minutes of plugging it in and turning it on. The valve cover gasket was leaking at the outlet side of the head and at the back of the head around the vacuum pump. This device produces smoke. It also creates a lot of pressure. I had blocked the inlet tube with a rubber glove slipped over it and this device fully inflated it. Everything you need is included except baby oil. I am very happy with it and it will be useful in the future.
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