I have a '94 YJ with the 4.0L EFI. I just got done dropping the tank and replacing the two fuel lines that attach to the pump and then attach into the metal fuel lines right above the rear axle. This is the third time I've had to have this done because of fuel leaks on these lines. The prior two times I've had done at a local shop. The lines that the shop put on it were standard 5/16" fuel/vapor lines so that's what I put back on.
While working on this myself I noticed that the 5/16" line was almost too small for one of the ports on the fuel pump, but when I got a larger diameter fuel line that fit the fuel pump it didn't fit the metal line that runs up to the engine. The new line was way too big!
So I have a couple questions. I know there fuel lines specifically for fuel injection, should I have used one of these lines? Are the two lines coming from the pump the same or would one be a vapor line and the other a high pressure?
I found this website with a diagram of my fuel system.
FUEL LINES, REAR YJ BODY. Fits: 1994 JEEP WRANGLER 4.0L I6 Power Tech, 5-Speed Manual | FACTORY CHRYSLER PARTS
I replaced items 8 & 9, however a better description isn't listed on the website of those item numbers. Can somebody tell me what type of lines numbers 8&9 are supposed to be? And if fuel/vapor line is ok or if I'll need to change them out again.
Thank you, I highly appreciate it!