Checked tonight and have 90psi at the pipe going into the fuel pressure regulator but zero pressure in the actual fuel rail, surely this is pointing to a failure of the pressure regulator rather than the fuel relay as there is no fuel in the rail to be injected and to the best of my knowledge the relays fires the injectors, the pressure regulator has no electrical connection or link to the fuel injection relay. Totally appreciate any suggestions and clearly I don’t know what I am doing hence the question.
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