More FI ????

[Mike Cardwell]

Okay, I have a few more stupid questions. I have studied the diagrams on this site for connections and I'm a bit confused (doesn't take much)
1. It appears that the cold start valve is connected to one side of the left fuel line distributor. Correct?
2. On the other side of the fuel line distributor, it appears to have the pressure regulator hooked to it. Correct?
3. Where does the hose from the throttle valve housing connect to?
4. What connections are made to the right fuel line distributor? (other side of cold start valve and ______?
5. Where does the other line from the pressure regulator hook to?
Thanks for any info.

[Dave at Pelican Parts]

I will assume by "left/right fuel line distributor" you mean the fuel rails.

The exact connections of fuel lines vary from year to year. In particular, some cold start valves have only one connection for a fuel line, while some have two connections. The ones with two connections are a part of the fuel circuit, while the ones with one connection are a side-branch off of the circuit.

The general theory is this: Fuel comes from the fuel pump, goes around to all of the parts of the engine, then goes to the fuel pressure regulator. From the regulator, it returns to the fuel tank.

Now for specifics:
In general the CSV is hooked up to the left-side fuel rail. The left-side one is usually the closest rail to the CSV, which makes it more convenient. On my 74, the center port on the fuel rail hooks to the CSV.

On my 74, the aft port on the fuel rail goes to the pressure regulator. (The front port goes to the front port on the right-side fuel rail--that's how the fuel gets in from the pump.)

There is no fuel hose on the throttle body. There is one or two vaccuum hoses; these go to the distributor. If you have a 2.0 or a 75 1.8, you can check the vacc hose diagram on the 914 Fan Page www.914fan.net under Tech Refs to see which is which.

On my 74, the right-side fuel rail is connected as follows--the front goes across the engine to the left-side rail. The center port was originally plugged with a bolt, but now has my fuel pressure gauge mounted on it. The aft port goes to the fuel pump by way of one of the "hard" plastic lines coming up from underneath.

The two connections from the pressure regulator are from the fuel rail, and out to the gas tank. On pre-75 cars, the path actually goes to the "Y" junction by the fuel pump. The "Y" joins the "R" port from the pump to the line from the regulator, and connects that to the hose running back to the tank.

Hope this helps.

--DD

[rich]

Ask Wayne if he sells the 914-914-6 handbook by Lash International. This book has the best fuel routing diagram I've ever seen. (it may have come from an other source who knows) I tried to scan it so I could e-mail a copy to you but I couldn't shrink it and keep it readable. So buy this book. When I tried to reassemble my 1.7 after 1.5 years the diagram was priceless.
p.s. It also has a great F.I. wiring diagram.