So recently I've been having some fuel leaks. First I noticed my primary injectors were leaking. Went and get a better spacer/oring and that fixed that problem. Then I noticed my aftermarket FPR would leak a little on the in-line. Wrapped with teflon tape and did some extra screwing and that fixed that.

Now I notice the fittings that screw into my fuel rails are leaking slightly so I have to go back in and will probably wrap those with teflon tape and screw it back into my rails.

For those with aftermarket rails/setup, what did you guys do in order to eliminate any chances of future leaks.

 

Remove the UIM. In the diagnostic box jumper the F/P and GND terminals and turn the key to the on position. This will continously pressure the fuel system so you can inspect for leaks without running the engine. Put on some safety glasses and then pull hard on every fitting and connection. If you assembled AN lines, put one hand on the actual fitting and one hand on the hose itself and pull. The hose should not back out of the fitting.

 

My test rig

Fuel leaks used to be a real PITA, so I finally decided to eliminate as many potential leaks as I can before working on related parts.

 

Yea I've done the F/P to GND diagnostic box and I ended up still having leaks. I pulled the rails and put teflon tape on them. Before I bolted everything back down, I went ahead and do the F/P to GND diagnostic again. Fuel pressure was showering 39-40psi which is what I set it at checked for leaks and saw none.

Bolted everything back down, started the car and let it run for a little and saw no leaks. Drove the car for a mile or two, parked the car checked for leaks and nothing.

So far so good...