924Board.org

[nuno almeida]

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?

check the photos here: https://rennlist.com/forums/924-931-944-951-968-forum/1471933-ground-issues-fuel-pump-dont-prime.html#post20052440

[924RACR]

I wouldn't do the ring terminal thing, no...

Did you similarly clean the ground for the fuel pump? It's back under the carpet in the hatch, by the taillights... if you have that much corrosion in the front of the cabin... that lovely sea air!!
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

[nuno almeida]

yeah i check the hatch one, its all clean!

[morghen]

Check the fuse, if you have one of those newer fuses thats plastic and not ceramic, it probably got hot and melted out of shape.
You can give the contacts a clean with isopropanol and scotchbrite.
_________________
Supercharger and EFI kits
https://www.the924.com

[nuno almeida]

I'll try to check it over the weekend. By the way, do you happen to know the correct amperage?

[morghen]

A little search never hurt anyone.
Its 16A according to the schematic below.
Fuse Nr.2 from the auxiliary fuse panel. Mind the orientation of the panel to correctly identify the fuse.

https://www.924board.org/viewtopic.php?t=30590


_________________
Supercharger and EFI kits
https://www.the924.com

[nuno almeida]

thank you !!!