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Old 11-08-2017, 04:18 PM   #21
City: Melbourne, FL
Country: USA
Join Date: Dec 2014
Posts: 1,462
Take a short piece of vinyl tubing, put one end outside the ER, and then have a loop down and back up inside the engine room. Fill it with a bit of colored water and see what vacuum / pressure you have on your ER. That's the cheapest vacuum gauge you can get.
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