I want to install a fuel gauge but selecting a gauge is limited to direct injection. Does anybody know what is the fuel pressure is in the lines and can anybody also tell me if our system is returnless.
The system runs up to and around 200 bar or a little more from memory, usually controlled by a relief valve. A returnless system, never seen one. Where does the excess fuel go?
excess fuel is recirculated to the HPFP. You can monitor fuel pressure via OBD2. Installing a traditional line pressure gauge is not advised nor useful.
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