ok, I just hooked-up the vacuum gauge to the fuel-dumper vacuum line. At idle I get about 16 inHg (-55 kpa , -7.9 psi). If I rev up the engine a little then I get about 19.5 inHg (-66 kpa , -9.6 psi). Here are some pics: https://ibb.co/yddjjGr https://ibb.co/bv49CvW What do you think Metacom?
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