Metal fuel rails in 914 2.0L

[tshih]

Dear Pelicans,

Anyone can please post a PET diagram showing all the fuel rails and routing of fuel lines in the 1973/4 2.0L D-Jet system. I just bought a set of rails which feed the injectors but the metal line which was corroded (and discarded!!) was much larger in length as well as have some bends in it which I don't recognize (from a 1975 2.0l motor which is the engine I'm rebuilding to upgrade from a 1974 1.8L). I need to get an idea of what's missing before I hook the engine up to the 2 fuel lines (plastic OEM) for the new rebuilt 2.0L to run with 1974 config. FI.

Thanks,
Tom

[Dave at Pelican Parts]

Check the "EFI Hose Diagrams" available on this site. Go to the main Porsche page, look down the left-hand side under "914" for "EFI Hose Diags".

The fuel rails for all four-cylinder 914s are very nearly the same. The only difference is that some have fittings in the middle (for the 2.0 cold-start valve and possibly for other uses on other cars) and some do not.

--DD

[tshih]

Thanks Dave,
But I'm not looking for hose diagram. I'm interested in the metal line parts in the fuel routing from the fuel pump to the plastic line going into the engine line which goes next to what part and from the ends of the rails to (what?) before attachment to the return plastic line to the tank.

[Dave at Pelican Parts]

I guess I don't understand--sounds like you're describing just what the hose diagram shows??? The fuel lines are also shown on the hose diagrams, after all.

--DD

[tshih]

Dave,
You're right about the confusion. The part that I'm looking to replace due to rust through leak is a metal rail that seems to feed the 2 rails shown in green in the diagram you refer me to. However the diagram you show has only red high pressure fuel lines shown (but not metal or with any part number). I need to see the PET diagram showing your diagram with each part with part number so I can replace the metal one with a hole in it which I had thrown out before getting ID of it. The 2.0L engine containing this piece was a 1975 MY engine with extra emission parts and may be different from your 2.0L diagram.

[tshih]

The metal part that had a rusty hole in it may be part of the secondary air injection emission control line from the air pump to the exhaust channels in the heads. All I remember was the engine was decommissioned due to fuel spurting out somewhere when the key was turned on so the rusty holey metal tube found may not be part of the fuel delivery system. So if that's the case then I don't need to replace it since the air injection ports have been plugged up in the rebuilt heads.

[Dave at Pelican Parts]

That may very well be. Or someone may have added an aftermarket metal fuel line or something to that effect. I believe that the plumbing of the fuel lines on the 73-76 2.0s is pretty much identical, and the only metal parts that the fuel passes through are the fuel rails, the fuel pressure regulator, the fuel pump, and the very front parts of the center tunnel fuel lines. The rest is plastic or regular high-pressure fuel hose.

--DD

[swl]

does this help at all. Not a PET diagram and from a 73 1.7 but it might help.

[tshih]

Thanks ,
but I think the metal piece I'm looking for is part of the air injection system plumbing for the 1975 2.0L which is not needed now.