Hey! I did have issues but during installation.
I kept having leaks from the upper orings that go into the rail.The black injector o-rings that came with the injector seemed to fit loose.
I ended up finding some thicker ones from dorman that worked perfect.No issues afterwards.I did notice that the stock return line bottoms out a lot into the regulator port.
I had to crank it down a bit in order for it to stop leaking.