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Fuel pressure Regulator


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#1 Boyer

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Posted 08 May 2010 - 08:25 PM

Well, i've had my suspicions. And i am pretty sure mines crapping out on me. I pulled the vacuum line off the side of it, and ALMOST got a buzz off of it from the fumes of fuel. I've had one sitting in my building for a while. I totally forgot about it too lol. How hard is it to swap out? I got the Torx security bits. is that all i need? And there was about 7 O-rings in the kit, where do they go to?

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#2 Injuneer

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Posted 08 May 2010 - 08:48 PM

My Chiltons indicates for the 3.4L engine "The pressure regulator and the fuel rails are serviced as a complete assembly only. DO NOT attempt to remove the regulator cover from the fuel rail." While Chiltons is not always 100% correct, and I've never worked on a 3.4L, thought it was worth mentioning.
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#3 Boyer

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Posted 08 May 2010 - 08:57 PM

My Chiltons indicates for the 3.4L engine "The pressure regulator and the fuel rails are serviced as a complete assembly only. DO NOT attempt to remove the regulator cover from the fuel rail." While Chiltons is not always 100% correct, and I've never worked on a 3.4L, thought it was worth mentioning.


Haynes says a similar statement. But, it also says "Regulator rebuild kits are now available and are much less costly than an entire fuel rail assembly."

The paper that comes with the regulator states that i need to unscrew the torx screws, while holding down the regulator casing, due to the fact there a lot of spring tension under it. Replace the diaphragm and screw back in, and torque to 15ft lbs. But states nothing about the o rings in the kit.

Edited by Boyer, 08 May 2010 - 08:58 PM.

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#4 Scotts 98

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Posted 09 May 2010 - 04:14 AM

I had to replace the regulator in my 98 Bird with the 3.8. The manual showed that I had to take the whole fuel rail assy off but I just took the cover off the regulator and replaced the diaphragm. The way its positioned on this 3.8 made me use a mirror and patients but I got it done.

Edited by Scotts 98, 09 May 2010 - 09:00 AM.

1968 Dodge SuperBee
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#5 Boyer

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Posted 10 May 2010 - 03:37 PM

For anyone who wants to know, For a 3.4l, all you gotta do is unscrew the Torx screws and replace the diaphragm. Easy as it sounds. lol
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1996 Pontiac Firebird - 3.8L, Bone stock, 4L60E


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#6 FBN Firebird Nation

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Posted 10 May 2010 - 03:54 PM

Great info Ryan, thanks for posting it as I am sure others will find it very useful. :12EMOTICHEERS:

#7 ScottyEl

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Posted 10 May 2010 - 04:15 PM

Hey guys,

I'm trying to replace my fuel pressure regulator in my 96 3800. I was there for about 2 hours with snap ring pliers and a mirror, with all my coil packs removed trying to get the snap ring out.Couldn't do it. Even if I was able to get it out, I feel like it would take a miracle to balance the snap ring on the pliers, and get it back in there without the snap ring falling off the pliers. How did you do it Scotts 98?? Is there an easier way to do this? Should I take the whole fuel rail out?


Thanks for any help you can offer guys.

#8 Scotts 98

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Posted 10 May 2010 - 06:35 PM

I should of used offset snap-ring pliers but I used a scribe and small screwdrivers, Careful not to put too much body weight on your headlight assy. It was not fun but it beets taking the intake off. Once you get the snap-ring out, the diaphragm comes right out, the new one goes right in, don't worry, the spring isn't tough to hold in. I just used my fingers to get the snap-ring back in, atleast part way, then used the small tools to snap it in. You will have to use a mirror so you can see what your doing. Nice design GM! You can do it if my old A$$ can.
On an earlier post, I cant remember her name but she did this also...
Good luck.

Edited by Scotts 98, 10 May 2010 - 06:38 PM.

1968 Dodge SuperBee
383 Magnum
Auto




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