defender dinky Posted September 5, 2021 Share Posted September 5, 2021 Hi all, just wondering if I remove the return pipe off fuel regulator, would this tell me if I have enough fuel pressure, thinking if there is fuel pressure it would release excess, as I don't have pressure kit yet to test it, efi v8 range rover, dd Quote Link to comment Share on other sites More sharing options...
missingsid Posted September 5, 2021 Share Posted September 5, 2021 In theory that sounds like a reasonable thought unless the regulator is the fault in which case you will think all is good and chase the problem elsewhere that is a red herring. I would pipe it to a container not spray the engine bay. Quote Link to comment Share on other sites More sharing options...
Escape Posted September 5, 2021 Share Posted September 5, 2021 That test will prove fuel flow, not fuel pressure. The regulator will open when it reaches a certain pressure and allow fuel to flow back, so it does prove the pump is delivering enough to get the regulator to operate. But you need to know the actual pressure before the regulator for fault finding. You can use an (old) tire pressure gauge on the fuel rail valve to get a reading. Quote Link to comment Share on other sites More sharing options...
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