I have a 1984 Porsche 924 with 125hp, and it’s been parked since around 2021. One day while I was driving, it completely died and wouldn’t show any signs of life.

I haven’t had time to work on the car since then, but I always suspected it was a ground issue.

Now I finally have time to get back to it and want to get it running again, so I started investigating the problems. The main issue was that the fuel pump wasn’t priming. I checked if voltage was reaching it, and there was nothing, so I suspected the relay. I tested the relay and it’s good, so I went on to check the ground points.

I found a ground point under the steering wheel that I think might be the issue (photos attached). I tried disconnecting all the wires (one of them broke, so I wrapped it around the connector), and I cleaned the area where the wires connect, wasn't able to clean the ends of the wires. I tested again but it still didn’t work — the pump still doesn’t prime. I think just cleaning isn’t enough and I might need to replace the ends of all the wires.

I was thinking about cutting them all and joining them together into a single ring terminal. Would that be a good idea?





after

after

before

before

 

That's some pretty heavy oxidation but I wouldn't go as far as cutting all the wires and replacing the ends. I'd use some DeOxit and a little bit of sandpaper to clean the female quick connects (sandpaper first, just lightly, then the DeOxit), then some DeOxit Shield for protection.

I know you wrote that you tested the relay, but did you test for power at the relay socket?

Probably the best place to start to hunt things down systematically is via Clark's Garage procedures; have you taken a look at those?

Cheers

 

The problem is that they’re in a really difficult place to work on, still thinking if i spend time cleaning it or just rewire everything hahaha. I think at the time I checked and yes, there was voltage at the relay, but it wasn’t clicking. I’ll double-check that over the weekend.
I’ve never heard of the Clark’s Garage procedures — what is it?

 

Except he has a completely different engine, so Clark's is not much help in that area. For 924 (not S) engine problems, I recommend going to 924board.org for help. Much bigger concentration of Audi based engine experts there.

 

Ah, sorry, I didn't catch the 924 part of things!

Agreed that Clark's Garage won't be of direct help. If you want to read about general techniques for systematic trouble shooting, this is the place to go: https://www.clarks-garage.com/shop-m...ure-index3.htm

Cheers

 

ill check it, thank you!

 

I took a quick look at the schematic. You should have 12V at fuse 2 (counting from the left) of the small fuse board while cranking the engine. If not, you can make a jumper to temporarily bridge pins 30 and 87 of the fuel pump relay socket to see if it will start. If it does, likely the relay has gone bad.

 

i think its not a relay thing before i test the relay i bought a new one, and still no clicking