paxton fuel pressure regulator

nextime · 03-27-2002, 07:11 PM

ok read down at the bottom and you can see whats in my car. yeah i finally got a fuel pressure regulator. it is a used blue billet paxton adjustible regulator for $35. i know how to put it on my fuel rail but i dont know how to adjust it. i know how to adjust the set screw on top but do i adjust the pressure with the vaccum line on or off and i know it should be set at approx 40lbs. i have also purchased 24lb injectors and a 70mm mass air but i wont have them till the end of april so i just want to get this regulator on with my stock 19lb injectors.

sn95gt19 · 03-28-2002, 05:01 PM

i know on stock to slightly modified cars the fuel pressure should be at 38-40 without the vaccum line hooked up when you hook up the line it should drop to about 32-35psi, you might need more fuel pressure than that though because of your mods.

Rick 91GT · 03-29-2002, 10:46 AM

I say set it to 38psi vac off like mentioned above, make sure you tighten the 9/16" nut on top after you are done adjusting. Turn it a little then hit the throttle and see where the pressure settles, then lock the nut down. Are you running a FMU?

The adjustable regulator will only give you more fuel at WOT, the stock EEC will adjust the pulse width of the injector to make the A/F ratio what it needs to be, the only way to get more fuel down low is to increase the injector size.

chris91LX · 03-29-2002, 12:40 PM

The vaccuum line should be off but you should plug the fitting on the regulator with your finger to get true readings, otherwise it's still sucking air.

03-27-2002, 07:11 PM	#1
nextime Registered Member Join Date: Sep 1998 Location: Brookfield,Wisconsin,US Posts: 23	paxton fuel pressure regulator ok read down at the bottom and you can see whats in my car. yeah i finally got a fuel pressure regulator. it is a used blue billet paxton adjustible regulator for $35. i know how to put it on my fuel rail but i dont know how to adjust it. i know how to adjust the set screw on top but do i adjust the pressure with the vaccum line on or off and i know it should be set at approx 40lbs. i have also purchased 24lb injectors and a 70mm mass air but i wont have them till the end of april so i just want to get this regulator on with my stock 19lb injectors. __________________ Thank You! 2003 Cobra Convertible

03-29-2002, 10:46 AM	#3
Rick 91GT Procharged! Join Date: May 1999 Location: Hanover, PA Posts: 1,539	I say set it to 38psi vac off like mentioned above, make sure you tighten the 9/16" nut on top after you are done adjusting. Turn it a little then hit the throttle and see where the pressure settles, then lock the nut down. Are you running a FMU? The adjustable regulator will only give you more fuel at WOT, the stock EEC will adjust the pulse width of the injector to make the A/F ratio what it needs to be, the only way to get more fuel down low is to increase the injector size. __________________ *D/R 10108 NMRA Drag Radial, 25.5 chassis, F1R* *Check out RNH Performance Performance Engines and Custom Fabrication.* *From Mild to Wild we can build what you want, when you want it.* FOR SALE Stainless Steel Torque Box Supports

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
fuel pressure issues	mustang98gt	Modular Madness	3	07-05-2003 10:43 PM
walk a blind man to the fuel pressure regulator please!	1jimmy__d	Windsor Power	2	08-23-2002 08:12 PM
adjustable fuel pressure regulator	87 GT MUSTANG	Windsor Power	9	08-15-2002 09:36 PM
Installing a fuel pressure regulator	moponys	Windsor Power	7	07-20-2001 09:36 PM
Fuel Pressure Regulator???	King Snake	Modular Madness	0	03-10-2001 07:51 PM

03-28-2002, 05:01 PM	#2
sn95gt19 motors done......woohooo Join Date: Mar 2002 Posts: 799	i know on stock to slightly modified cars the fuel pressure should be at 38-40 without the vaccum line hooked up when you hook up the line it should drop to about 32-35psi, you might need more fuel pressure than that though because of your mods.

03-29-2002, 12:40 PM	#4
chris91LX Registered Member Join Date: Oct 1998 Location: Suburban Chicago, Hanover Park Posts: 695	The vaccuum line should be off but you should plug the fitting on the regulator with your finger to get true readings, otherwise it's still sucking air.