Just figured out that I have been running lean from using the D16A6 fuel pressure regulator on the B16a fuel rail. Plugs are very white and it misfires when I close the throttle. Do I order the one for the 99 Civic Si? Will it work with all my fuel lines? Do I need to order additional fuel lines? I don't want this thing to be starved. Thanks.

 

It would be stupid not to order it. Buy the fuel pressure regulator made for the car or better yet, buy an adjustable one so that you can add more fuel pressure if need be.

 

Well I can't exactly order the part for my JDM engine specifically. I figure the Si motor is pretty much the same thing so I'll order that one, just checking to make sure it works.

 

Your JDM engine didn't come with it mounted on the fuel rail? Mine did. The return line was cut, but that's a low pressure line anyways so I just unclamped it and clamped my CX's line onto the end of the JDM press. reg.