Do the Nismo pumps have a built in non return valve in the pump? Or is it the little part that comes with the kit? I played with it a bit and decided it wasnt a check valve so I didnt put it in. Will have to see If I can adapt a fuel pressure gauge in there. Think I can, have an old gauge from work at home just have to get some barb fittings and chuck it in somewhere
Your talking about fuel pressure dropping off to quickly when the engine is turned off? or is the FPR supposed to keep a small amount of fuel in the pressure side? I imagine the FPR drains through an orrifice when the car is turned off to drain the pressure out of the system, but having never had a fuel pressure gauge in there I'm not 100% sure on what it should do
Thanks