Fuel Pump Relay

My 1986S randomly will not start, but when I change out the Fuel Pump Relay she'll kick over. I'll drive it 5-10 times and then again will not start. Changing out the Fuel Pump Relay seems to solve the starting problem, but I know it will continue to happen. Any suggestions on where to trouble shoot is greatly appreciated. Also, where is the Fuel Pump located?

-David

David....the fuel pump is located at the rear of the car, passenger side.

You can normally here it buzzing away when the engine is running which sometime gets louder as the pump ages.

It is known to fail with the symptoms you describe.

HOF928;8441 wrote: My 1986S randomly will not start, but when I change out the Fuel Pump Relay she'll kick over. I'll drive it 5-10 times and then again will not start. Changing out the Fuel Pump Relay seems to solve the starting problem, but I know it will continue to happen. Any suggestions on where to trouble shoot is greatly appreciated. Also, where is the Fuel Pump located?

-David

I agree with Malcolm but will add that you should check the relay for oxidation.
Dose it look corroded, at all, where the relay plugs in.
Maybe it would be best to disconnect the battery and remove those two top screws in the fuse panel so that you can look at the back of the panel.
If you don't find anything and have already tried a new relay, then you better do a search on how to test a fuel pump.

Ive mentioned this a zillion times previous: the fuel pump relay is a type 53 which is super common on the newer 928 fuse/relay panel and they're cheap.

Buy a bunch (10?) replace all the ancient ones and have several new left over as spares then, and I know this step hurts, throw the old ones away:p

Thanks Malcolm and Brad! I have pulled the panel and everything seems in order. My guess is also a Bad Fuel Pump. In the mean time, I will load up on a few inexpensive 53 Relays and start shopping for a Replacement Fuel Pump. There seems to be quite a few options: SL, Airtex, Delphi, Bosch... I'll do a bit of research, but your expertise is appreciated.

Here are one of the few threads when I did a search.

forums.928oc.org/vbulletin/showthread.ph...hlight=fuel+pressure