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I want to test my fuel pressure regulator for 1:1 boost. so, can I just add pressure on the regulator and see if the fuel pressure follows. I plan on doing this at engine idle...or I guess it doesn't really need to running. Is my thinking correct?
 

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correct. pump on and use a vacuum pump/pressure tester on the vac line to the reg. if base is 42 psi, you add 10 inchs of pressure the fuel pressure should go to 52
 
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