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> Fuel pump relay location, 1974 D-Jet
mittelmotor
post Aug 10 2012, 12:09 AM
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Hi guys,

I tried searching a bit, but couldn't find this exact info. Where is the fuel pump relay on a 1974 914 2.0 located?

I'm doing a V-8 conversion, so I sold the driver's-side relay board in the engine compartment with the 2.0-liter. I hope it wasn't on there. (IMG:style_emoticons/default/sad.gif)

Thanks!
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TheCabinetmaker
post Aug 10 2012, 03:56 AM
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You sold your fuel pump relay?
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SLITS
post Aug 10 2012, 07:00 AM
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QUOTE(mittelmotor @ Aug 9 2012, 11:09 PM) *

Hi guys,

I tried searching a bit, but couldn't find this exact info. Where is the fuel pump relay on a 1974 914 2.0 located?

I'm doing a V-8 conversion, so I sold the driver's-side relay board in the engine compartment with the 2.0-liter. I hope it wasn't on there. (IMG:style_emoticons/default/sad.gif)

Thanks!


It was, but is controlled by the ECU (or at least the ground to it is).
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Dave_Darling
post Aug 10 2012, 09:47 AM
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It was on the board that you sold.

(IMG:http://www.914world.com/bbs2/uploads_offsite/www.pelicanparts.com-121-1344613651.1.jpg)

--DD
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germanv82000
post Aug 10 2012, 09:55 AM
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If you are doing a v8 conversion you can wire the fuel pump to a switched circuit of your choice. Carbureted? Fuel injected pump is going to put out probably too much fuel pressure.
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mittelmotor
post Aug 10 2012, 07:44 PM
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Thanks guys. I thought if I still had the relay, I could simply run the wire from the original pump's plug to the new front-mounted pump, but now I know I need to create a new circuit.

It's an injected LS1, and I'm using the GM filter/regulator (58 psi) and a Walbro 255 pump.

--Doug
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swl
post Aug 11 2012, 02:18 PM
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back a while ago there was a thread with a cct to run the fuel pump without the ECU. The trick was to do what the ecu does - shut off the fuel pump if the engine stops turning. Important in case of an accident. If I remember right The oil pressure switch was used to sense that the engine was running.
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