Adjustable Fuel Pressure Regulator
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Joined: Oct 1999
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Adjustable Fuel Pressure Regulator
Hey, I got that AFPR from turbocity and that screw that comes out from the hole that u twist to increase or decrease, do u leave that in there when install it or how does that go in there?? Is it suppose to protrude thru the bottom of it when I install it and what is that cone thing for and where does that go? Thanks 

Last edited by 91Bird305; Mar 19, 2002 at 11:06 AM.
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Car: 91 Red Sled
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<-- shakes head while wondering why you didn't just make your own adjustable.
Anywho; Yes it's suposed to stick out. This lets you adjust the pressure without taking the injector pod off. That cone is where the spring sits. To increase the fuel pressure you need to screw down on the spring. The pressure regulator is on the return fuel line side after the injectors. If you back out the screw you decrease fuel pressure.
Anywho; Yes it's suposed to stick out. This lets you adjust the pressure without taking the injector pod off. That cone is where the spring sits. To increase the fuel pressure you need to screw down on the spring. The pressure regulator is on the return fuel line side after the injectors. If you back out the screw you decrease fuel pressure.
Thread Starter
Supreme Member

Joined: Oct 1999
Posts: 2,977
Likes: 1
From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
<-- shakes head while wondering why you didn't just make your own adjustable.
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From: CC, TX
Car: 1999 Yamaha Banshee
Engine: 379cc twin cyl 2-stroke stroker
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how much was that. that is a helluva lot easier then taking the pod off everytime you want to make an adjustment
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Thread Starter
Supreme Member

Joined: Oct 1999
Posts: 2,977
Likes: 1
From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Is that the only reason you bought it? So u could adjust w/o removing the cylindar?
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From: Ga
Car: 91 RS
Engine: 305
Transmission: T5
Axle/Gears: 3.73
OK guys.....do you want me to show you how to make the stock pressure reg adjustable without removing it from the unit?
Last edited by DM91RS; Mar 20, 2002 at 06:49 PM.
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Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
Originally posted by DM91RS
OK guys.....do you want me to show you how to make the stock pressure reg adjustable without removing it from the unit?
OK guys.....do you want me to show you how to make the stock pressure reg adjustable without removing it from the unit?
Thread Starter
Supreme Member

Joined: Oct 1999
Posts: 2,977
Likes: 1
From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Originally posted by DM91RS
That's the help others spirit that we need on this board
That's the help others spirit that we need on this board
Thread Starter
Supreme Member

Joined: Oct 1999
Posts: 2,977
Likes: 1
From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Oh yeah....I forgot the new guy has to change the targets. LOL
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