Any markings on fuel lines to reveal age?
05-19-2014, 04:24 PM
#16
Nordschleife Master
It looks like if you loosened that nut slightly, and with your right hand rotate the hose counter clockwise and re-tighten the nut, the contour should take it off the filler. This line is contoured precisely for that.
05-19-2014, 04:38 PM
#17
Instructor
I just replaced mine last week with hoses from Roger. I'm pretty sure mine were original and I could no longer make out any writing on the lines. However, there was a fair amount of dust/grime on them. They didn't look particularly bad until I bent them--and then small cracks appeared all over the place. They were kinda stiff, significantly more so than the rubber in the new replacement lines.
I'd say that at least taking one of your hoses off and giving it a good hard look while bending at least gives you an idea of how brittle they may be currently.
I removed the relay to my fuel pump when I did it. 928gt.com has a listing of all the relays as a function of year. So, it takes some of the guesswork out of yoinking the correct relay. That said, I ended up pulling the fuel injection relay instead of the fuel pump relay. I misread the diagram :/ I can't imagine that pulling the fuel pump relay would cause damage, but I'm not an expert. In my singular case of pulling the wrong relay (the car still died so I didn't realize it at the time), she fired right up afterward with no issues.
I'd say that at least taking one of your hoses off and giving it a good hard look while bending at least gives you an idea of how brittle they may be currently.
I removed the relay to my fuel pump when I did it. 928gt.com has a listing of all the relays as a function of year. So, it takes some of the guesswork out of yoinking the correct relay. That said, I ended up pulling the fuel injection relay instead of the fuel pump relay. I misread the diagram :/ I can't imagine that pulling the fuel pump relay would cause damage, but I'm not an expert. In my singular case of pulling the wrong relay (the car still died so I didn't realize it at the time), she fired right up afterward with no issues.
05-19-2014, 06:49 PM
#18
Pro
Thread Starter
Thanks for the continued replies.
Did you start the car before or after pulling the fuel pump relay?
I guess I was worried about any issues that might arise from running the engine dry of fuel. Didn't know if injectors could get overheated, or something else. What does the ECU do when it can no longer meter the correct mixture because the fuel has no pressure? Things like that.
P.S. I spoke with Roger today and will be ordering Doc Brown's fuel lines, along with a bunch of other stuff.
Did you start the car before or after pulling the fuel pump relay?
I guess I was worried about any issues that might arise from running the engine dry of fuel. Didn't know if injectors could get overheated, or something else. What does the ECU do when it can no longer meter the correct mixture because the fuel has no pressure? Things like that.
P.S. I spoke with Roger today and will be ordering Doc Brown's fuel lines, along with a bunch of other stuff.
05-19-2014, 07:05 PM
#19
Nordschleife Master
I didn't do anything like pulling a relay to 'dry' the lines.
Just wait at least 10-15 mins after you last turned off the engine, and the pressure will drop. There'll be leakage when you loosen the nut, but nothing a small towel can't handle.
Wisest choice with Greg's lines.
You must get some Loctite 574 for sealing fuel line flange heads. Greg Brown told me to get this. He said this is what he uses. Got mine on Amazon, and use it sparingly. Works like a charm.
Just wait at least 10-15 mins after you last turned off the engine, and the pressure will drop. There'll be leakage when you loosen the nut, but nothing a small towel can't handle.
Wisest choice with Greg's lines.
You must get some Loctite 574 for sealing fuel line flange heads. Greg Brown told me to get this. He said this is what he uses. Got mine on Amazon, and use it sparingly. Works like a charm.