How to change the fuel pressure regulator 3.4l ?

[Prisoner1138]

Ok, so I know that if I have someone hold down the gas pedal, the throttle linkage is out of the way so I can remove the bolt holding it in place. But after that, it seems to screw into the fuel line, how do I actually remove it?

It doesn't seem that I can unscrew it straight off due to the flange for the bolt to hold it to the fuel rail.

It doesn't appear that the big hex nut portion actually rotates(and even if it did, I can't figure out how I'd get a wrench in there to turn it).

Is the only way to bend the fuel line away from the rail to unscrew it?

[rixGAphx]

Ok, so I know that if I have someone hold down the gas pedal, the throttle linkage is out of the way so I can remove the bolt holding it in place. But after that, it seems to screw into the fuel line, how do I actually remove it?

It doesn't seem that I can unscrew it straight off due to the flange for the bolt to hold it to the fuel rail.

It doesn't appear that the big hex nut portion actually rotates(and even if it did, I can't figure out how I'd get a wrench in there to turn it).

Is the only way to bend the fuel line away from the rail to unscrew it?Do NOT try to bend the fuel tube, it is quite weak and will CRIMP (Oh Sh!at!!) very easily.

Take your time, and remove everything that’s in the way of decent access.
Buy a pair of UIM gaskets, and just pull the entire UIM assembly out of the way; only takes 10 mins to remove and 15 to re-install.
You haven’t even gotten to the fun part yet, where great access is necessary:
The Hex nut MUST be removed, but then you pull the FPR up and loose from the fuel tube.
Seems easy, but it’s a PITA, since there’s an oversize O-ring between the tube and a groove inside the FPR. Much twisting and swearing will be required to separate these, and the O-ring will be damaged.
Buy a new O-ring of the same oddball size, or the new FPR will leak.

These hints are relative to my ’96 3.1, and your 3400 should be similar or identical.

Hope this helps,
-Rick

[Prisoner1138]

Are you serious?

Dammit. To the shop it is then. I don't have the tools, space, or time to pul the UIM off. Swapping a part or two in the parking spot in my apartment complex is one thing, not ripping half the engine apart no matter how "quick" it is.

[boomboomgrandam]

i changed mine in 45min,never removed the UIM.
if u want I can try to do a write up on it when I get out of class

[Prisoner1138]

That'd be awesome.

[boomboomgrandam]

Ok, I'm not the Best at How-Tos, but here I go.
Remember No SMOKING, Your messing with Pressurized Fuel
1. Disconnect Battery
2. Remove Intake Where It Connects To the TB
3. Remove Bracket For the throttle and move to the side.
4. Remove Engine Hoist Bracket (not sure what to call it, this gives you room to turn the wrench) I Didn't reinstall mine So all You See are the 2 bolts that held it on.
5. Disconnect Vacuum Line on the FPR (Fuel Pressure Regulator), also move out your way the PVC.
6. Carefully remove the lower Nut on the FPR (its best to use 2 wrenches, one to hold it in place and the other 2 turn, But I only used one and held it in place with my hand. I also not sure on the size of the nut, I belive i used a 15/16 open wrench. It also helps if you got a friend to Hold The Throttle open while doing this.) Once the nut is off You should be able to push down on the metal pipe to disconnect it.
7. Remove the Screw that hold the FPR to the Fuel Rail. The FPR Should Pop out with little effort.

Install in reverse, Make sure u use all new O-rings


Not Bad for a Lunch break =p
Hope This Helps You Feel free to ask more question if I left something out.

-Shawn

[Prisoner1138]

Hmm, I suppose the biggest things to do and allow room to move are #3 and #4.

[boomboomgrandam]

yes,the are very simple to remove, and will save you some head scratching/swearing also.

[Blackhawk]

The biggest problem I had was when the nut on the fuel line dropped down to the bend and was a little awkward to get back into place. I removed nothing and just kinda worked the FPR out with someone holding the throttle.