Help with 1984 wiring and no start.
 

Can anyone help identify this wire. It is similiar to the ignition green wire under the hood. It is also in a loom with a smaller brown and blue wire behind the fuse block.
https://cimg9.ibsrv.net/gimg/rennlis...1f0051afc7.jpg

Trying to upload the other pics but unable to. Anyine else have trouble loading pictures? It tries to load then goes to a screen that says "alert"

Here's a couple you posted in my FB group. Have not had time to pull out the WSM to assist, my apologies.

https://scontent-dfw5-1.xx.fbcdn.net...a8&oe=5F1CC8B5
https://scontent-dfw5-2.xx.fbcdn.net...2c&oe=5F1E6DBD

I think that is for the OX sensor. The green wire should go to the L-Jet. The blue should go to W8, and the brown i would guess would be grounded above the CE panel.

The wiring from the OX sensor should come through a hole in the trans tunnel, you might have to peel back a little of the carpet.

https://cimg6.ibsrv.net/gimg/rennlis...b10f967819.jpg

Thanks Alex for the small add on with numbers for the connectors many should be able to use this info.

Thank you, I think I can discount that as my no start issue.

The car only starts with jumper wire in the fuel pump relay spot. Could the factory alarm be blocking a signal? if so is there a bypass?

Yes. You can use a bypass jumper on the Z-plug. You need to search for the exact terminals. Maybe 1 to 4? Please double check.
Good luck,
Dave

https://cimg5.ibsrv.net/gimg/rennlis...31ead9fda.jpeg

Getting to that connector requires removing the glove box. The alternative is easier by unplugging the Z connector and bridging connections at the CE panel, as shown.
https://cimg1.ibsrv.net/gimg/rennlis...cc95ad16f0.jpg

Thanks, Moose. That's the one.
Dave

My '84 Euro used to do that: Start only with a jumper in the fuel pump relay slot. Determination was made that the fuel pump relay apparently gets it's ground from the LH, and basically it's one of the stages of the LH going bad. I had the LH rebuilt by John Speake (through Roger) and the issue has never again resurfaced.

I know the 84 Euro (LH fuel injection) is substantially different that the US version (L jet fueling), but I thought it might help to check the relay ground.

See if you can source a local who will let you plug you L jet computer into their running 928 to test your computer. If their engine will not start without a jumper in the fuel pump relay, you will know what the problem is.

https://cimg7.ibsrv.net/gimg/rennlis...8465334a49.jpg
no plug in that spot. does this mean the factory alarm has been taken out or it never had one?
https://cimg8.ibsrv.net/gimg/rennlis...5265727001.jpg
the male connection is missing for z6 port
https://cimg0.ibsrv.net/gimg/rennlis...eed120b525.jpg
this is possibly it and has been taped up?

Have you long or short keys? If short you haven´t factory alarm. Option codes M520 or M525 or M533 or M534 are Porsche Alarmsystems. Look at the sticker under the carpet in the back.

none of those codes listed so I guess I can discount that as my no start issue?

I think so...

Changed injector and seals and now things have gotten worse.. Still no start but it runs perfect with fuel relay bypassed. The real bad thing is I started the car and a tool dropped into the fan and ruined the radiator and fan. I had everything secured in a safe place so I thought. It just sucks. Can a 928 radiator be repaired?. I do have a good radiator shop near by. Also I would need a new fan. Any ideas on what is the best way to go. I am getting to the point of just junking it and not spending anymore money repairing a car that will not start anyway.

Fan and radiator are available. You may find used at 928 International.
This is redneck, but you could run a jumper with a toggle switch to the relay board and up under the dash somewhere easy to reach. You would have a fuel pump switch, also a kill switch. I know the right thing is to diagnose and replace faulty components, but it sounds like you need to drive your car. Don't forget to turn the switch off when not in use.
Good luck,
Dave.

That has crossed my mind since I know the car does run good if the fricken thing would just start. What would I expect to pay for used fan and radiator. 1984

I don't see used radiator on 928 Int'l, or fan.
They sell a new CSF radiator for $650.
Roger at 928srus would have similar and new fan.
It's an expensive mistake, but at least you'll have a new radiator. I had mine fail twice, before I bought a new one.
Sorry for your trouble and frustration. You are a member of a large club of pros and diy'ers who have left tools in the engine bay with various results.
Good luck,
Dave

did you check the grounds in the hatch?
many times these cause an unstart
either on the floor or behind the RR quarter liner

I have gone over that area and will look again. Someone does have a battery disconnect on the negative ground that I am unsure of. I will try and post some pics and with advice maybe I can get rid of that mod and get it back to factory.

the grounds i am referring too are a collection of brown wires bolted to the chassis.