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Hi. So today i installed the new Bosch fuel pump from pelican, car wants to start with starter fluid but then dies. Has spark dme and pump fuse new. Still not getting gas. Must be a sensor. Bummed.

Old 05-09-2024, 04:15 PM
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I can take things apart , and change parts but. It great with electric stuff. I’m 74 now and getting better from bone cancer so working on my car is hard now. Was hoping the fuel pump and dme and fuse would do the trick. So I probably have two good Bosch fuel pumps now.
Old 05-09-2024, 08:33 PM
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Quote:
Originally Posted by Nick Triesch View Post
I can take things apart , and change parts but. It great with electric stuff. I’m 74 now and getting better from bone cancer so working on my car is hard now. Was hoping the fuel pump and dme and fuse would do the trick. So I probably have two good Bosch fuel pumps now.
Nick
did you really try to jump the fuel pump at the fuse panel as i have showed you on the picture ?And the pump did not run?
Ivan
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Old 05-09-2024, 10:58 PM
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Ivan. I did use my alligator clips wire to jump in the fuse panel like you showed me. I got nothing ! I’ll try again today. It’s weird , car wants to start with starting fluid. So still no gas going to the motor.
Old 05-10-2024, 06:13 AM
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Have you checked the back of the DME relay socket for bad connections? What typically happens is that the #30 wire (big red - constant battery) becomes corroded.
You can check for this by leaving the DME relay plugged-in and removing back cover from the relay socket. Just removing the red wire and cleaning it, can solve starting problems.
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Old 05-10-2024, 07:04 AM
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Or you may try the 3-wire jumping of the DME relay socket described by Quicksilver on previous page. Remove the DME relay under driver seat. Make a piece of wire like the one shown on the pic. It is like a star with 3 legs.
If you can't get a hand on banana plugs of the right size, just twist and fold back each end of wires so as to form a ball that fit snug inside the female terminal and make contact with it.

Terminals to short together are 87, 87b and 30. Then you should hear the pump running. This can save you from being towed to get home.

In order to just check if the pump can be heard, you can try to just short 30 and 87b (leaving out 87). This time a single piece of wire is enough and this should allow to make the pump run. No need to switch the ignition on. This is of course just to check and hear the pump run, not to start the engine.
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Old 05-10-2024, 07:12 AM
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I have two new DME relays. All the same , car will not start.
Old 05-10-2024, 07:31 AM
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Yes but Dave and I are not talking about the DME relay itself, but its socket. This is the next thing to be checked.
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Old 05-10-2024, 07:34 AM
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Quote:
Originally Posted by Nick Triesch View Post
Ivan. I did use my alligator clips wire to jump in the fuse panel like you showed me. I got nothing ! I’ll try again today. It’s weird , car wants to start with starting fluid. So still no gas going to the motor.
Jump fuse #3 with a properly fused bypass.

See if that works.
Old 05-10-2024, 10:14 AM
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When I jump 3 fuse , where do I put the other clip please?
Old 05-10-2024, 10:48 AM
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Bottom of fuse #2.
Old 05-10-2024, 10:50 AM
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Thanks!
Old 05-10-2024, 10:56 AM
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Holy crap!! Fuel pump came alive. Now must find out why car not starting. Should I keep making the pump work with leads to prime the pump?
Old 05-10-2024, 11:02 AM
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Ok here is the thing. By jumping the pump came alive but now it will not. Fuses look ok itbdid prime the motor a bit
Old 05-10-2024, 11:11 AM
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Nick ,by any chance do you have any kill switch-relay you know of which could be in the fuel pump circuit.
Let`s see the wire to your fuel pump fuse-the bottom one....take a picture 6th direction from your windshield
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Old 05-10-2024, 11:25 AM
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Originally Posted by wazzz View Post
Or you may try the 3-wire jumping of the DME relay socket described by Quicksilver on previous page. Remove the DME relay under driver seat. Make a piece of wire like the one shown on the pic. It is like a star with 3 legs.
If you can't get a hand on banana plugs of the right size, just twist and fold back each end of wires so as to form a ball that fit snug inside the female terminal and make contact with it.

Terminals to short together are 87, 87b and 30. Then you should hear the pump running. This can save you from being towed to get home.

In order to just check if the pump can be heard, you can try to just short 30 and 87b (leaving out 87). This time a single piece of wire is enough and this should allow to make the pump run. No need to switch the ignition on. This is of course just to check and hear the pump run, not to start the engine.
That doesn't solve the problem with a bad DME female connector, where the red wire is corroded at the female connector set screw. The back of the DME connector needs to be opened and inspected.

The jumper suggestions are a waste of time when the #30 female connector is bad! Remember, the DME ECM also gets power from the #30 wire at the DME relay socket.
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Last edited by mysocal911; 05-10-2024 at 12:02 PM..
Old 05-10-2024, 11:56 AM
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I have two new DME relays. All the same , car will not start.
That's been a waste of time. Read post #57!
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Old 05-10-2024, 11:57 AM
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Quote:
Originally Posted by Nick Triesch View Post
Holy crap!! Fuel pump came alive. Now must find out why car not starting.
Yep, looks like you now have two working fuel pumps.

Quote:
Originally Posted by Nick Triesch View Post
Should I keep making the pump work with leads to prime the pump?
I would remove the connection to bottom of #2 and jump fuse #3 top to bottom with that same fused bypass.

Then jump the fuel pump relay as wazzz, quicksilver said below.

http://forums.pelicanparts.com/porsche-911-technical-forum/1161236-3-2-just-died-after-ride-2.html#post12244688
http://forums.pelicanparts.com/porsche-911-technical-forum/1161236-3-2-just-died-after-ride-3.html#post12247146

Turn the key and see if it works, no need to start.
Old 05-10-2024, 12:44 PM
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As suggested, I jumped top of fuse 3 bottom of fuse 2 , pump came alive. Replaced some fuses . Fuel pump fuse was wrong amp , car started , car is fixed.
Old 05-10-2024, 01:21 PM
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Quote:
Originally Posted by Nick Triesch View Post
As suggested, I jumped top of fuse 3 bottom of fuse 2 , pump came alive. Replaced some fuses . Fuel pump fuse was wrong amp , car started , car is fixed.
Typically something simple!

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Old 05-10-2024, 02:15 PM
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