I personally dont know much about vq30 swap into an S-chasis. I've seen other members attempt it, but i was just curious why you put "because of a walbro fuel pump" in quotes? im guessing someone told you that? If your car is running rich at idle then an adjustable fuel pressure regulator could be a solution, but most likely the engine needs to be tuned. sorry i couldnt be more help.Andrewvw wrote:Hi I have a vg30de in my s13. I have absolutely no idea how I need to wire up my speedo. I want to wire up my s13 cluster but don't know how to. & it's running rich "because of a walbro fuel pump." would a fuel pressure regulator fix this?