New 928 purchase

[Paul Shepherd]

I have just purchased but not recieved yet a nice 1984 S2 euro model and there are a few electrical issues I will need to sort out.

The fuel sender has stopped working, gauge works when you complete the circuit at the sender connector
The oil pressure gauge and the alternator gauge both stopped working at the same time and also the stereo possibly at the same time but not sure

Just wondering if these are common problems or if anyone has any ideas of the fix

Thanks

[harborman]

In general, everyone goes through a clean up of all CE panel relays, fuses, contacts, connectors and ground points. CE panel is located under the foot well on passenger side. Buy several cans of Deoxit and spray all contacts. There are numerous ground connections that also are usually cleaned. If the braided battery ground strap is original, replace it for about $40. There is a 14 pin connector on passenger side engine compartment near front. This should also be cleaned. There are ground points under the instrument cluster and a block to frame ground under the car. This should keep you busy for a day or so.

[JhwShark]

Originally Posted by harborman

In general, everyone goes through a clean up of all CE panel relays, fuses, contacts, connectors and ground points. CE panel is located under the foot well on passenger side. Buy several cans of Deoxit and spray all contacts. There are numerous ground connections that also are usually cleaned. If the braided battery ground strap is original, replace it for about $40. There is a 14 pin connector on passenger side engine compartment near front. This should also be cleaned. There are ground points under the instrument cluster and a block to frame ground under the car. This should keep you busy for a day or so.

+1
On the 14 Pin...there are two parts to the connector, upper and lower, the loom/bundle of wires that run down below the engine carry the Oil pressure and level, ALt, Starter there is also a separate large gauge RED wire to the ALt (then to Start then to Bat). These lower wires in the loom can degrade over time and have corrosion deep down the loom due to moisture gaining entry going downstream combined with heat...the 14 Pin should have a plastic cover.

[Paul Shepherd]

Thanks for the replies I will put aside next weekend to get into it

[Landseer]

Exactly what was stated in posts above!

[JK McDonald]

Hey Paul - Just about everyone has the electrical issues already mentioned above. Often the problems will be related to cleaning up the fuse panel, multiple ground points spread throughout the car, the 14 pin connector located on the passenger side fender well and/or the rectangular edge connectors that bring all the inputs to the instrument pod.

A safety related area that should be addressed as soon as possible are the rubber high pressure lines to the fuel rails, injectors, pressure regulator and dampeners around the engine compartment. There are several good write-ups on what to look for, the steps involved and the parts to replace.

One other precaution when initially filling the gas tank - there is an equalizing vent line about 12" long and 5/8" diameter that is often deteriorated from age on the top side of your fuel tank. The main filler inlet and body of the tank is made in a horseshoe shape and this equalizing vent line will drain the top 15% of a complete fill-up onto the ground. It is not a difficult job but the tank must be dropped to make the repair.

Naturally on my first visit to a filling station there were several by-standers watching as I proudly screwed my gas cap back on - only to watch a shower of fuel rain down under the rear of the car. I spent the next 20 minutes with a water hose spraying the car and cement off.

Michael