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DanPorges
Samba Member
Joined: September 13, 2014
Posts: 119
Location: Natick, MA
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 Posted: Fri Oct 24, 2014 6:59 am Post subject: removing electric fuel pump |
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| I am converting the 79 SB I have to carbs for a high performance motor. Can anyone walk me through how to remove the fuel pump, the front electric one, and which fuse and wiring I should remove so I don't have extra wires hanging? |
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jhicken
Samba Member
Joined: October 24, 2003
Posts: 9466
Location: Fallbrook, CA
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| Posted: Fri Oct 24, 2014 12:02 pm Post subject: |
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Why do you want to remove it? Use it and block off the stock pump on the case.
-jeffrey
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Der Kleiner Kampfwagens |
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Glenn 
Mr. 010
Joined: December 25, 2001
Posts: 76911
Location: Sneaking up behind you
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| Posted: Fri Oct 24, 2014 12:31 pm Post subject: |
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He would need a regulator to drop the pressure.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
#BlueSquare |
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[email protected]
Samba Member
Joined: June 02, 2011
Posts: 1593
Location: Louisville, ky
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| Posted: Fri Oct 24, 2014 12:43 pm Post subject: |
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Electric fuel pump is not stock. So the PO (previous owner) wired it using whatever wire he had hanging around the garage so we don't know what color to look for. He wired it so something hot, probably, but not necessarily to the fuse box. It is probably, but no necessarily the same color as the wire to the fuel pump. And if he were smarter than the average PO he would also run a wire back to the Coil to add a fuel shutoff solenoid.
If he did run a wire to the coil, and even better if he ran it in the wiring harness leave that wire there. If you ever decide to add a tach or a temperature sensor you will already have a wire. |
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jhicken
Samba Member
Joined: October 24, 2003
Posts: 9466
Location: Fallbrook, CA
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| Posted: Fri Oct 24, 2014 12:44 pm Post subject: |
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Refresh my memory, how much pressure does the stock electronic pump put out?
-jeffrey
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Der Kleiner Kampfwagens
Last edited by jhicken on Fri Oct 24, 2014 12:49 pm; edited 1 time in total |
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jhicken
Samba Member
Joined: October 24, 2003
Posts: 9466
Location: Fallbrook, CA
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| Posted: Fri Oct 24, 2014 12:47 pm Post subject: |
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It would have been stock for a '79
-jeffrey
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HRVW
Samba Member
Joined: May 01, 2011
Posts: 2531
Location: Rosarito, Mexico
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| Posted: Fri Oct 24, 2014 1:14 pm Post subject: |
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 28lbs seems to ring a bell compared to 2-3 for Dual carbs.
Injectors need a lot of pressure along with the excess gas returning back into the tank. |
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jhicken
Samba Member
Joined: October 24, 2003
Posts: 9466
Location: Fallbrook, CA
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| Posted: Fri Oct 24, 2014 4:08 pm Post subject: |
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I think you are right, the OP could always remove it and install a Rotary pump in the same place.
-jeffrey
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DanPorges
Samba Member
Joined: September 13, 2014
Posts: 119
Location: Natick, MA
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| Posted: Fri Oct 24, 2014 8:13 pm Post subject: |
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| Thanks for the responses. I have a brand new motor coming next week which is a 1914cc dual carb setup with a case mounted fuel pump so I need to eliminate the electric one for all of the reasons mentioned above. My thoughts were to leave the wire in place and just remove the fuse in case someone ever wants to put it back to stock, but I'm not able to identify the fuse and wiring clearly from the various Clymer's and other manuals I have been reading. |
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wrocek
Samba Member
Joined: June 08, 2013
Posts: 397
Location: North Illinois
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| Posted: Fri Oct 24, 2014 9:38 pm Post subject: |
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Another FI engine gone
RIP 
_________________
159 2001 678, FI convertible.
AJ 133584*
Made Monday, September 18th, 1978 -> 381-9460 |
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hitest
Samba Member
Joined: September 30, 2008
Posts: 10296
Location: Prime Meridian, ID
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| Posted: Fri Oct 24, 2014 9:41 pm Post subject: |
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| wrocek wrote: |
Another FI engine gone
RIP |
X2- exactly what I was thinking as I descended the thread...
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| EverettB wrote: |
I wonder what the nut looks like.
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'62 L390 151, '62 L469 117, '63 L380 113, '64 L87 311, '65 L512 265, '65 L31 SO-42, '66 L360 251, '68 L30k 141, '71 L12 113, '74 ORG 181
FU#5 |
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Joel
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Joined: September 04, 2006
Posts: 11099
Location: NSW Australia
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| Posted: Fri Oct 24, 2014 10:09 pm Post subject: |
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| DanPorges wrote: |
| Thanks for the responses. I have a brand new motor coming next week which is a 1914cc dual carb setup with a case mounted fuel pump so I need to eliminate the electric one for all of the reasons mentioned above. My thoughts were to leave the wire in place and just remove the fuse in case someone ever wants to put it back to stock, but I'm not able to identify the fuse and wiring clearly from the various Clymer's and other manuals I have been reading. |
Silly thing is according to the wiring diagram the fuel pump isnt even on a fused circuit.
maybe put an inline one on the wire where it leaves the relay
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Quick little bug, you got a Porsche motor in that?
1974 Germanlook 1303 2.5 Suba-Beetle |
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DanPorges
Samba Member
Joined: September 13, 2014
Posts: 119
Location: Natick, MA
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| Posted: Sat Oct 25, 2014 6:48 am Post subject: |
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| wrocek wrote: |
Another FI engine gone
RIP |
Its not gone yet, just wont be in my bug. Its sitting on a stand with a box of FI parts and harnesses next to it. Its for sale! The motor has a burnt #3 exhaust valve, but was otherwise running well....i drove it home from the PO on 3 cylinders. |
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