Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

 
Reply to this topicStart new topic
> Barely a dribble, Fuel
930cabman
post Jun 10 2024, 01:38 PM
Post #1


Advanced Member
****

Group: Members
Posts: 3,756
Joined: 12-November 20
From: Buffalo
Member No.: 24,877
Region Association: North East States



Tracking down a low fuel flow issue, it looks like it starts with the flow directly from the tank. Sure, it's a small steel line, but the flow is very little. If the pump is not receiving enough, how can it push anything back to the engine. Drawing a blank

carbs, pump in front
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Superhawk996
post Jun 10 2024, 01:52 PM
Post #2


914 Guru
*****

Group: Members
Posts: 6,574
Joined: 25-August 18
From: Woods of N. Idaho
Member No.: 22,428
Region Association: Galt's Gulch



Clogged filter sock in tank most likely based on what you’ve posted.

The other possibility is kinked fuel line coming out of the tank.

Least likely but not impossible is that the tank isn’t venting. Pop the fuel cap - if flow improves it’s venting.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
930cabman
post Jun 10 2024, 01:56 PM
Post #3


Advanced Member
****

Group: Members
Posts: 3,756
Joined: 12-November 20
From: Buffalo
Member No.: 24,877
Region Association: North East States



QUOTE(Superhawk996 @ Jun 10 2024, 01:52 PM) *

Clogged filter sock in tank most likely based on what you’ve posted.

The other possibility is kinked fuel line coming out of the tank.


Looking through the filler inlet I can see the sock looks reasonable. Will pull the tank later to look for a kink.

The number of options for this is very low
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
fixer34
post Jun 10 2024, 02:08 PM
Post #4


Senior Member
***

Group: Members
Posts: 1,193
Joined: 16-September 14
From: Chicago area
Member No.: 17,908
Region Association: Upper MidWest



Are you checking at the metal pipe coming out of the tank, or a rubber line attached to it? If rubber line, it may be swollen.
If the metal pipe, carefully push a a piece of copper (soft) wire into the hose and tank. It should go in a good 3-4 inches. Just be ready if it clears out something, you will get all the fuel flow you ever wanted...

If that doesn't do it, then probably time to pull the tank. If I recall, getting that pipe off while in the car is not easy. Maybe drain the tank using a siphon pump.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Jack Standz
post Jun 10 2024, 02:28 PM
Post #5


Member
**

Group: Members
Posts: 403
Joined: 15-November 19
From: Happy Place (& surrounding area)
Member No.: 23,644
Region Association: None



QUOTE(930cabman @ Jun 11 2024, 02:56 AM) *

QUOTE(Superhawk996 @ Jun 10 2024, 01:52 PM) *

Clogged filter sock in tank most likely based on what you’ve posted.

The other possibility is kinked fuel line coming out of the tank.


Looking through the filler inlet I can see the sock looks reasonable. Will pull the tank later to look for a kink.

The number of options for this is very low


You can see the fuel lines from under the car (and if you have a door covering the front fuel pump area, you can check the lines there too) without removing the tank. Good luck with the fix!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
930cabman
post Jun 10 2024, 05:18 PM
Post #6


Advanced Member
****

Group: Members
Posts: 3,756
Joined: 12-November 20
From: Buffalo
Member No.: 24,877
Region Association: North East States



QUOTE(Jack Standz @ Jun 10 2024, 02:28 PM) *

QUOTE(930cabman @ Jun 11 2024, 02:56 AM) *

QUOTE(Superhawk996 @ Jun 10 2024, 01:52 PM) *

Clogged filter sock in tank most likely based on what you’ve posted.

The other possibility is kinked fuel line coming out of the tank.


Looking through the filler inlet I can see the sock looks reasonable. Will pull the tank later to look for a kink.

The number of options for this is very low


You can see the fuel lines from under the car (and if you have a door covering the front fuel pump area, you can check the lines there too) without removing the tank. Good luck with the fix!


I am not running a return line, so one of the lines on the bottom of the tank is plugged up. I had my feed line on the wrong one, switched them and now the sock is doing it's job and the flow is much better
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
fixer34
post Jun 10 2024, 07:29 PM
Post #7


Senior Member
***

Group: Members
Posts: 1,193
Joined: 16-September 14
From: Chicago area
Member No.: 17,908
Region Association: Upper MidWest



It's usually the simple things...
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Jamie
post Jun 10 2024, 07:50 PM
Post #8


Senior Member
***

Group: Members
Posts: 1,074
Joined: 13-October 04
From: Georgetown,KY
Member No.: 2,939
Region Association: South East States



That sock is a useless item, much better to install an external filter right out of the tank before the pump which can then be visually checked and easily replaced. (IMG:style_emoticons/default/WTF.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
930cabman
post Jun 11 2024, 04:55 AM
Post #9


Advanced Member
****

Group: Members
Posts: 3,756
Joined: 12-November 20
From: Buffalo
Member No.: 24,877
Region Association: North East States



QUOTE(Jamie @ Jun 10 2024, 07:50 PM) *

That sock is a useless item, much better to install an external filter right out of the tank before the pump which can then be visually checked and easily replaced. (IMG:style_emoticons/default/WTF.gif)


Yes, I always install a filter as soon as the fuel exits the tank and another in the engine bay before the carbs
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 14th December 2024 - 05:43 PM