 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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| SLITS |
Mar 24 2009, 10:53 AM
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
Sorry I didn't fully read the post .... You say you pegged a 60 lb guage. If you close off the return line by dead heading into a guage you will peg the friggen guage. You plugged the bleed off so the PRV doesn't really come into play.
Read pressure between the fuel pump and PRV anywhere you can tap in, but do not dead head the pump ... I don't know the max pressure on a D-Jet pump, but a CIS pump, dead headed will peg a 150 PSI guage. Hey Geoff ... you still rebuilding MPSs? |
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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 underthetire If you are new to FI, i suggest you read all of th... Mar 24 2009, 11:19 AM McMark :agree: Check fuel pressure at the CSV port.
If f... Mar 24 2009, 01:03 PM 76-914
:agree: Check fuel pressure at the CSV port.
If ... Mar 24 2009, 10:43 PM 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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