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Discussion Starter · #1 ·
i have installed boost gauge yesterday...
cut the famous rubber hose black with green stripe underneath intake manifold....(hear air vaccum when i make the cut)
-when i start the car its goes 15 psi in vaccum
-when i rev the motor vaccum is topping to 20 psi and stay at this point (ive do a steet run too)
-stop completely the engine and its stay to 20 psi vaccum
- the only way to drop to zero is unplug the hose

i think its the gauge is faulty but..want to know your experience before order new gauge
its marshall brand

all you help will be appreciated
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