 FI Challenged Individual Checking Fuel Pressure, and a question re: fuel pressure regulator |
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| 76-914 |
 Mar 23 2009, 10:56 PM
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Repeat Offender & Resident Subaru Antagonist  Group: Members Posts: 13,876 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California 
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Trying to teach myself about FI. Bear with me! Does it matter where you check the fuel pump pressure i.e. before or after the pressure regulator? Secondly tell me if I got this right: 76 2.0 GC series engine; Fuel leaves the tank, flows thru fuel filter to pump where it is pumped to the passenger side fuel rail the over to the drivers side fuel rail. One branch on this fuel rail feeds the cold start valve while the other branch goes to the pressure regulator. If pressure exceeds appx 35psi then excess is bled off and routed back to the tank outlet/pump inlet junction??? Is this how it works???? Thirdly, does Pelican rent a gage? I took a water pressure gage (0-60lb) and checked pressure on outlet side of PRV. It pegged the gage so I'm thinking wrong gage/wrong side of PRV or pump is on steriods. Can ya hep me?
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| McMark |
Mar 24 2009, 01:03 PM
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914 Freak! Group: Retired Admin Posts: 20,180 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
(IMG:style_emoticons/default/agree.gif) Check fuel pressure at the CSV port.
If fuel pressure is low there, but pegging the gauge at the outlet of the regulator, then likely your fuel hoses are hooked up backwards near the battery. |
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| 76-914 |
Mar 24 2009, 10:43 PM
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#3
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,876 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California
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QUOTE(McMark @ Mar 24 2009, 12:03 PM)  (IMG:style_emoticons/default/agree.gif) Check fuel pressure at the CSV port. If fuel pressure is low there, but pegging the gauge at the outlet of the regulator, then likely your fuel hoses are hooked up backwards near the battery. I don't think they are???? Before connecting either of them I kicked the pump on and assumed the one shooting petro was off the pump. This is the hose I connected to the right side rail. This is the part where I got stupid and dead headed. The only remaining original hose was left in place still connected to the pressure reg valve so I could test easily the fuel pressure. I will replace that hose and test with system intact. |
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Posts in this topic
76-914 FI Challenged Individual Checking Fuel Pressure Mar 23 2009, 10:56 PM
SLITS Tank .... fuel filter ..... pump .... passenger si... Mar 24 2009, 06:56 AM
type47
Pressure should be measured at tap for cold star... Mar 24 2009, 07:21 AM Bleyseng or if its pegged it could be a pinched return hose... Mar 24 2009, 08:08 AM SLITS Sorry I didn't fully read the post .... You sa... Mar 24 2009, 10:53 AM underthetire If you are new to FI, i suggest you read all of th... Mar 24 2009, 11:19 AM 76-914 Hot Damn this is some good information. Dead head ... Mar 24 2009, 10:21 PM McMark
That's a good way to get it right. But getti... Mar 25 2009, 11:22 AM 76-914
That's a good way to get it right. But gett... Mar 25 2009, 03:29 PM 76-914 :headbang: OK. Retested at "test port" a... Mar 25 2009, 03:25 PM |
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