Fuel Pressure Too High
#448156
April 30, 2016 10:27 pm UTC
April 30, 2016 10:27 pm UTC
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Joined: Jan 2002
Posts: 1,006
Ottawa
Charles Lavoie
OP
Serious Member
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OP
Serious Member
Joined: Jan 2002
Posts: 1,006
Ottawa
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AFPR Installed (FuelLab).
Fuel Pump is a DeatschWerks 340lph
Car Off, ECMLink Turn On Pump. I can adjust to 43.5.
Car On, Vacuum Off, I cannot get the pressure below 49 before the top screw comes out.
Fuel Return Issue? The return is in the shape of an S but I don't see kinks. Thoughts?
Thanks!
P.S. Electronic gauge plugged into gauge port on the AFPR. Maybe should get Mech gauge. >.<
1. Overunning stock 8mm return line
2. Restriction (kink, dmg to return line)
3. Other ideas?
Last edited by Charles Lavoie; April 30, 2016 10:32 pm UTC.
98,6Bolt,3"EXH,LINKV3,780cc,SD,SCM61@26PSI, 340LPH,AFPR,TSBOV,REARWB,FMIC,2"RAD(20/80/WW)
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Re: Fuel Pressure Too High
[Re: Charles Lavoie]
#448160
May 01, 2016 12:56 am UTC
May 01, 2016 12:56 am UTC
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Joined: Oct 2010
Posts: 9,968
Caledon, Ontario, Canada
Bryan Lawrence
Senior Member, with Far TOO Much Time on Their Hands
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Senior Member, with Far TOO Much Time on Their Hands
Joined: Oct 2010
Posts: 9,968
Caledon, Ontario, Canada
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Yeah agreed with Stephan, do the Jerry can than you can confirm you don't have an issue. Sal is right your not going to over run the return and if you were it would do it with the car off.
"Old Blue" 91 Talon TSi AWD
"Super Enthusiast" 91 Talon TSi AWD
Checkout DSMFAQ.com!
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Re: Fuel Pressure Too High
[Re: Charles Lavoie]
#448161
May 01, 2016 01:18 am UTC
May 01, 2016 01:18 am UTC
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Joined: Jan 2002
Posts: 1,006
Ottawa
Charles Lavoie
OP
Serious Member
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OP
Serious Member
Joined: Jan 2002
Posts: 1,006
Ottawa
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Flow increases at voltage increases. (off 12 volts vs. 13.8 running). But I will accept the not overrunning the return.
I am measuring pressure from the gauge port on the FPR.
I re-grounded right onto the sensor, removed / reinserted the sensor and moved the return hose outwards to reduce the bends in the hose. Lowest I can go now is 44-45
I should have just bought a mechanical gauge. I will try jerry can and to shorten the return next time I take a week off work.
Last edited by Charles Lavoie; May 01, 2016 01:19 am UTC.
98,6Bolt,3"EXH,LINKV3,780cc,SD,SCM61@26PSI, 340LPH,AFPR,TSBOV,REARWB,FMIC,2"RAD(20/80/WW)
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Re: Fuel Pressure Too High
[Re: Charles Lavoie]
#450479
August 29, 2016 06:36 pm UTC
August 29, 2016 06:36 pm UTC
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Joined: Oct 2009
Posts: 27
BC, Canada
Carl Gould
Newbie on Probation
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Newbie on Probation
Joined: Oct 2009
Posts: 27
BC, Canada
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I know I'm 4 months late but did you ever get this resolved? Granted my setup is different (parallel walbro 255s) but I was unable to get my pressure under 60psi when I first got the car running. Where the return line gets back to the tank, there is a siphoning unit (I have no idea what this would technically be called) that has a small restriction in it in order to help balance the fuel levels between the two tank halves (again, working from memory on this). What I did was slightly drill out the restriction after reading a thread on DSMTuners about this same issue. I will try to find the thread as it had decent pictures. EDIT: http://www.dsmtuners.com/threads/2g-awd-fuel-siphon-mod.350851/
Last edited by Carl Gould; August 29, 2016 06:37 pm UTC.
97 TSi AWD
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Re: Fuel Pressure Too High
[Re: Carl Gould]
#450539
August 31, 2016 04:27 pm UTC
August 31, 2016 04:27 pm UTC
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Joined: Apr 2006
Posts: 3,873
Los Angeles, California
Alex Akachinskiy
Insane Member
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Insane Member
Joined: Apr 2006
Posts: 3,873
Los Angeles, California
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I know I'm 4 months late but did you ever get this resolved? Granted my setup is different (parallel walbro 255s) but I was unable to get my pressure under 60psi when I first got the car running. Where the return line gets back to the tank, there is a siphoning unit (I have no idea what this would technically be called) that has a small restriction in it in order to help balance the fuel levels between the two tank halves (again, working from memory on this). What I did was slightly drill out the restriction after reading a thread on DSMTuners about this same issue. I will try to find the thread as it had decent pictures. EDIT: http://www.dsmtuners.com/threads/2g-awd-fuel-siphon-mod.350851/ Can anyone confirm if this would be need for WALBRO 450LPH upgrade ? to keep base fuel pressure in check at 43.5 psi
1996 Eagle Talon TSi AWD
1999 Eclipse GST Automagic
1991 3000GT VR-4
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