Fuel pressure relief

whtpny · July 19th, 2008, 06:13 PM

Alright.. I'm trying to change my fuel filter and I'm waiting on the fuel pressure to relieve. I did exactly what it said in the Haynes manual and it said it might take "10 seconds to 10 minutes" for the car to stop running.. well mine has been running for nearly 30 minutes..

.. why is it doing this???

HMUSN · July 19th, 2008, 06:18 PM

did you hit the button in the trunk?

hardhitter · July 19th, 2008, 07:03 PM

My car took 0 seconds for the pressure to be relieved. I just unhooked the plug to the inertia switch.

whtpny · July 19th, 2008, 07:29 PM

this was an epic waste of a thread.. i posted this.. checked another forum and browsed it for maybe five minutes.. then i heard it shut off lol so i'm done with it now.. about to go eat some texas roadhouse and then watch the dark knight

travis_afx · July 20th, 2008, 12:20 AM

You really don't have to relieve the pressure, unless you want to of course. I have always just changed it without relieving the pressure, there isn't that much fuel that comes out when you take the filter off anyways.

Doc8224 · July 20th, 2008, 02:53 AM

Originally Posted by travis_afx

You really don't have to relieve the pressure, unless you want to of course. I have always just changed it without relieving the pressure, there isn't that much fuel that comes out when you take the filter off anyways.

+1 the whole job takes me less than 10 minutes and its nothing more than a wash my hands when I am done job.

whtpny · July 20th, 2008, 03:49 AM

yeah i hadn't done it before so i just followed the manual

jivepepper · July 20th, 2008, 03:52 AM

I have removed my pprv. So I never have fuel pressure once the car is shut off.

whtpny · July 20th, 2008, 03:56 AM

google tells me that that is the positive pressure relief valve.. lol.. but what would be the purpose of removing it?

jivepepper · July 20th, 2008, 04:19 AM

Originally Posted by whtpny

google tells me that that is the positive pressure relief valve.. lol.. but what would be the purpose of removing it?

It can dump fuel when shifting in between gears because the fuel pressure spikes. This can cause the car to loss fuel pressure for a sec and the car falls on it's face.

Is more previlant in the 03 cobra setups which I use. It also free's up fuel pump duty cycle because it's quite restrictive. This allows it to support a little more hp.

July 19th, 2008, 06:13 PM	#1
whtpny Hardcore Enthusiast 2002 Mustang GT Join Date: Feb 2007 Location: Gainesville, GA Posts: 1,642	Fuel pressure relief Alright.. I'm trying to change my fuel filter and I'm waiting on the fuel pressure to relieve. I did exactly what it said in the Haynes manual and it said it might take "10 seconds to 10 minutes" for the car to stop running.. well mine has been running for nearly 30 minutes.. .. why is it doing this??? __________________ Mods: Fidanza Al Flywheel, Steeda UDP, EMP/Stewart Components WP, PP Plenum, K&N FIPK, Mac Prochamber, Pypes Violator Catback WhtPny's Videos

July 19th, 2008, 07:03 PM	#3
hardhitter Enthusiast 1999 Mustang GT Join Date: Nov 2007 Location: Houston, TX Posts: 750	My car took 0 seconds for the pressure to be relieved. I just unhooked the plug to the inertia switch. __________________ Vortech V2-SQ

July 19th, 2008, 07:29 PM	#4
whtpny Hardcore Enthusiast 2002 Mustang GT Join Date: Feb 2007 Location: Gainesville, GA Posts: 1,642	this was an epic waste of a thread.. i posted this.. checked another forum and browsed it for maybe five minutes.. then i heard it shut off lol so i'm done with it now.. about to go eat some texas roadhouse and then watch the dark knight __________________ Mods: Fidanza Al Flywheel, Steeda UDP, EMP/Stewart Components WP, PP Plenum, K&N FIPK, Mac Prochamber, Pypes Violator Catback WhtPny's Videos

July 20th, 2008, 12:20 AM	#5
travis_afx Regular '02 GT Join Date: May 2007 Location: OK Posts: 369	You really don't have to relieve the pressure, unless you want to of course. I have always just changed it without relieving the pressure, there isn't that much fuel that comes out when you take the filter off anyways. __________________ BBK CAI, 75mm BBK TB, Trick Flow plenum, U/DP, spec clutch, short throw shifter, adj. upper cntrl arms, lower cntrl arms, 50/50 shocks, MAC exhaust, 4.10s, SCT flip switch http://www.ok-safe.com/files/documen...JR1089_int.pdf Read it

July 20th, 2008, 03:49 AM	#7
whtpny Hardcore Enthusiast 2002 Mustang GT Join Date: Feb 2007 Location: Gainesville, GA Posts: 1,642	yeah i hadn't done it before so i just followed the manual __________________ Mods: Fidanza Al Flywheel, Steeda UDP, EMP/Stewart Components WP, PP Plenum, K&N FIPK, Mac Prochamber, Pypes Violator Catback WhtPny's Videos

July 20th, 2008, 03:52 AM	#8
jivepepper Hardcore Enthusiast Join Date: Mar 2006 Location: Under a sombrero Posts: 1,340	I have removed my pprv. So I never have fuel pressure once the car is shut off.

July 20th, 2008, 03:56 AM	#9
whtpny Hardcore Enthusiast 2002 Mustang GT Join Date: Feb 2007 Location: Gainesville, GA Posts: 1,642	google tells me that that is the positive pressure relief valve.. lol.. but what would be the purpose of removing it? __________________ Mods: Fidanza Al Flywheel, Steeda UDP, EMP/Stewart Components WP, PP Plenum, K&N FIPK, Mac Prochamber, Pypes Violator Catback WhtPny's Videos

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