 Fuel pump help, fuel pump pressure return |
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| porscheteck914 |
 Mar 8 2024, 01:42 PM
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#1
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Newbie  Group: Members Posts: 38 Joined: 23-March 23 From: n.c. Member No.: 27,247 Region Association: North East States  |
Hi Fellows , I need some help /advice . 1973 914 1.7 with original Fuel Inj. Djet . Original 50 year old fuel pump -3 ports. When I go to start it , I have to bump the ignition switch 2 times to get it to start. Fuel pump runs . I have a fuel pressure gauge hooked up to drivers side fuel rail. Pressure goes to 36lbs when I turn on ign switch. When I turn off ign switch, pressure immediately drops to 0 psi. The real question is : Does the fuel system supposed to hold pressure or slowly leak down after ign switch is turned off ???? Does fuel pump have a pressure valve in its return to tank, to hold some pressure ? Do I need a new fuel pump ? thank you for any help . (IMG:style_emoticons/default/confused24.gif) Paul
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| ndfrigi |
Mar 8 2024, 03:35 PM
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#2
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Advanced Member Group: Members Posts: 2,960 Joined: 21-August 11 From: Orange County Member No.: 13,474 Region Association: Southern California 
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Hello @porscheteck914 ,
Looks like you have issue with ignition switch (which usually fail). Your fuel pressure with 36psi is on a high side. Usually 1.7djet should only have around 28psi. You can adjust the pressure on your fuel pressure regulator. |
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Posts in this topic
porscheteck914 Fuel pump help Mar 8 2024, 01:42 PM
brant For the original poster
You are correct
The 3 por... Mar 8 2024, 05:16 PM
porscheteck914
For the original poster
You are correct
The 3 po... Mar 8 2024, 06:38 PM wonkipop the pressurized circuit after the pump and to the ... Mar 9 2024, 12:30 AM |
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