FI fuel and wiring routing |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
FI fuel and wiring routing |
watsonrx13 |
Jul 21 2008, 06:20 AM
Post
#1
|
Advanced Member Group: Members Posts: 2,734 Joined: 18-February 03 From: Plant City, FL Member No.: 312 Region Association: South East States |
I've put my engine back in the car and want to confirm the FI fuel routing. I've looked at PP/Dave Darling's diagrams, but would like confirmation:
1. large (9mm) plastic fuel line from firewall connected to fuel filter 2. fuel filter connected to fuel pump at (S-suction) connection 3. (D-damper) connection on fuel pump connected to fuel rail on passenger side, rear connection 4. (R-return) connecton on fuel pump to Y connection 5. Y connection to small (7mm) plastic fuel line from firewall 6. Y connection to fuel pressure regulator 7. fuel rail on passenger side, front connection, to fuel rail on driver side, front connection 8. fuel rail on driver side, rear connection, to fuel pressure regulator 9. fuel rail on driver side, middle connection, to cold start valve. Also, I'd like confirmation on the electrical connection to the fuel pump: 1. black/red wire to the + side of fuel pump 2. brown wire to the - side of the fuel pump If I wanted to test the fuel pump outside of the car, I should be able to connect a positive wire to the + of the fuel pump, then to the + side of a battery, then - fuel pump to - battery. I could then connect the (S) fuel line and place in a container of gasoline. Then place the (D) and (-R-) fuel lines into an empty container. When I connect up the electrical lines, I should get the pump to hum and run fuel through the pump. Also, if I turn on the ignition, I should be able to get voltage across the black/red wire and the brown wire, correct? Finally, has anyone successfully found a shop that can rebuild these fuel pumps? -- Rob |
swl |
Jul 30 2008, 07:42 AM
Post
#2
|
Senior Member Group: Members Posts: 1,409 Joined: 7-August 05 From: Kingston,On,Canada Member No.: 4,550 Region Association: Canada |
That sliced casing is looking pretty suspicious. Did you unwrap the tape and see what was under there? A splice maybe?
I had the same sort of problem at the battery post as you describe. That would certainly have been the most likely cause of the majority of your problem. Just make sure your repair job is making good contact. So far you've done everything I would have done so I don't have much more to offer you. I've checked the wiring diagram and it confirms that it is a straight run from pin 14 to the battery. So we have the connectors on both ends and the conductor itself as the only source of the loss. By the sounds of things you already know that the back side of the plug slides off to expose all the pins. Those pins can pull up and out through the plug. That notwithstanding I would probably do my cleaning with the pin still in the plug. I get nervous about brittle wires. Never the less you can inspect the pin from that vantage point and get right on the conductor instead of the pin to measure for voltage. Thats what you meant when you said you are getting 10v at the wire right? I suppose in the worst case scenario you could run a new wire from the battery but that would be very fidgety to get it to fit into the plug. You would also want a new pin and I haven't a clue where you would get one. This is getting into Jeff Bowlsby's area of expertise. He's the wiring harness guru. Maybe send a shout out to him. |
Lo-Fi Version | Time is now: 8th June 2024 - 07:08 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |