Fuel supply 1982

Hi All
I am sure this have been discussed earlier, but...
I have a 1982 that fires and has recently been running like 6 month ago.
Today i found a dead fuel pump in the rear. As it is a EU model i dont know if there are more fuel pumps. The hose i took off the fuelpump seam to come straight from the tank. I drained the tank for old and ugly fuel. As it ran freely out of the tank i do not think thee is a pump in the tank.

Does anyone have any experience with this on a 1982 Euro model ??
Will i look for one more fuel pump ??

If you have a 1982 928S then you have a pump in the tank as well

HI and thanks for answer.
I guess i have to take the tank out to get to it ??
I can not hear it run when i put 12 volt on the cables from the external pump. I will assume they run together ??
When i drained the tank yesterday the old gas was running out like nothing stopped it in the tank.That is why i did not think there is a pump in there.

Jan, my '79 US had both internal and external pumps. Assuming that your '82 is the same, you don't have to take the tank out to get to the internal pump. The internal pump is immediately inside of where the fuel comes out of bottom of the tank. If there is an internal pump, it should be connected to electrical connections that should be visible from the outside of the tank at the same location. You get to the internal pump or the screen filter by taking out that connection. A pump is shown as #1 in this drawing, www.autoatlanta.com/porsche-parts/hardpa...78-82§ion=201-05 .
Be forewarned that a new internal fuel pump is expensive. I replaced mine with just a fuel strainer, shown as #2 in the drawing. I found that a new external pump and a clean fuel filter would meet the flow rate and pressure requirements for my CIS system. Also, first ( I know you know this, but) be very careful with all that gas! Great ventilation, no ignition sources close by and all that. Second, if you are going to remove the pump or strainer, that connection can be brittle. Be gentle and patient so that you don't crack the fuel tank accidentally.

If you are not hearing the external fuel pump run when you turn the ignition on and turn the key to the crank position, then something is not right, either electrically or with the external pump. You might want to diagnose the external pump issues first. You can take the fuel pump relay out and put a jumper between the appropriate slots to turn the fuel pump(s) on without needing a key or the engine running. It's been a while since I had to do that, but if you need guidance on doing that I can look it up for you or provide a reference.

I hope that this helps!

Hi and Thanks for good reply.
I am quite sure there is no pump in the tank as there are no wires what so ever to any pump in the tank. I am quite sure i just have a filter there. On the after part of the tank is a fuel pump and a filter. I have dismantled that and drained the tank. Uh ugly gas... The pump was exposed to 12 volt direct and does not run. So i have ordered a new pump, filter, copper rings and what ever needed. I have changed the relay, fusebox, and do not have 12 volt at the pump terminals when i turn the key to ignition. I do not know if the pump will run after start up or before start. There must be some regulation after the check valve that give signal not to give power to the pump. I cant seem to open the links sent to me so I am hoping for some result after i get my new pump. The car ran last fall and at that point a new pump and filter was installed. The car sat empty of fuel all winter in the frost so that has most likely a big impact on this issue. Besides that i came far with all the electrical parts as i am much better at that part. The things we do for love...

You sure seem to be on the right track! If 12 volts does not energize the pump, it’s dead! There is a safety system that shuts off power to the pump when the engine is not running. On start up, the pump has power when you are cranking the engine over and for about a second after you stop cranking. If the car started, then the pump stays on. So if the car is not starting, unless you are able to see the voltage when you are cranking, you may be getting voltage at the pump for just the short time that you crank. I’m with you, a new pump is probably the answer. Since you have identified the pump relay, I've attached a picture of the terminals to jump so that you can send voltage to the pump without having to crank. I found that jumping these terminals was very useful when diagnosing fuel delivery problems like you have.
I’m sorry that the link didn’t work. It’s a good site to use to see parts and to get part numbers. See if you can type in just through the /porsche-parts/ part of the address.

The black wires form my jumper in the fuel relay socket. I used a switch for this one, but the switch is not necessary.