Question about 1994 Buick LeSabre

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98 Buick Lesabre-fuel regulator

Sorry otis30223 Iwrote about a 98 when it should be a 94. Maybe it doesn't matter, when I remove the hose on the fuel pressure regulator, Which side(outgoing)? If i see fuel coming out is that the bad regulator. This problem usually occurs at 1/4 tank. Making the car very sluggish.

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The nipple that will leak it on the regulator, its a device that is about a inch around and sits just forward of the intake. The other end of the hose leads up to the top of the throttle body.

Posted on Aug 20, 2008


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My 2001 buick lesabre is pulling a random misfire code and spits and sputters and smells like the car is floading

find the fuel pressure regulator. you should see it mounted on the return line of the fuel rail under the plastic engine cover. it will have a small vacuum hose attached to it. Remove the hose and see if gas comes out of the regulator. If it does replace it immediately.

Apr 08, 2013 | 2001 Buick LeSabre

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Could cloaged fuel injectors cause fuel to leak out of throttle body on a 97 buick lesabre ?

Improve the FixYa experience for everyone by voting.
Hi Steven Phillips:
It's possible but not very likely unless there has been a recent removal of the injectors and new O rings were not installed.
I suggest that you take the vehicle to the closest AutoZone and have them perform a fuel pressure test and a full diagnostic scan. Both are free of charge.
It's possible that you have leaking fuel line or fuel pressure regulator. The pressure test will enable you to evaluate both possibilities. Incidentally, replacing O rings, fuel lines and pressure regulators are fixes you can do yourself.
Feel free to follow up with me should you so desire.
All the best,

Dec 04, 2011 | 1997 Buick LeSabre

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My buick seems to start with a rough idle but cleans up and runs good,sometimes it is hard to start and i have to finesse the gas pedal till it cleans up!!

there is a fuel pressure regulator located on the fuel rail. it is round and silver colored and will have a rubber hose coming out of the center of it. Remove the rubber hose and see if fuel comes out of the regulator. if it does replace it.

If it doesn't than you'll need to check fuel pressure with a fuel pressure gauge. If fuel pressure does not hold steady and falls rapidly than you may have a bad fuel pump.

If you have any questions let me know and I'll be happy to help.

Jul 12, 2011 | 1995 Buick LeSabre

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Do I have to drop the fuel tank to replace the fuel pump on a 94 Buick le saber

Yes ,,instructions are below, Use eye protection for this procedure
Remove or Disconnect:

  1. Relieve Fuel Pressure
  2. Disconnect negative battery cable
  3. Raise vehicle on hoist
  4. Remove Fuel Tank
  5. Remove Fuel Gage sending and pump assembly by turning cam lock ring counterclockwise. Lift assembly from fuel tank and remove fuel pump from fuel gage sender unit.
  6. Disconnect pump wires, hose clamps, and clamp around pump body
  7. Pull pump assembly out of rubber connectors
  8. Inspect fuel pump attaching hose for any signs of deterioration. Replace as necessary.
Install or Connect:

  1. Push fuel pump assembly into attaching hose
  2. Connect pump wires, hose clamps at attaching hose and around pump body
  3. Place Fuel tank sending unit and pump assembly into tank using new O-ring
  4. Place cam lock over assembly and lock by turning clockwise
  5. Install Fuel Tank
  6. Start engine and check fuel pipe connector for visual leaks

Oct 20, 2010 | 1994 Buick LeSabre

1 Answer

2003 Buick LeSabre. The vehicle is difficult to start after it has been run for a while and then let sit for 1-2 hours. At first it was infrequent but now it is all the time.

May have a leaky fuel pressure regulator leaking fuel unmetered into the engine. IF you pull the oil cap and filler neck off to remove plastic engine cover, the regulator is the round thing attached to the fuel rail with a vacuum hose going to it. If you take the hose off and u see fuel come out the regulator is defective.

May 19, 2010 | Cars & Trucks

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94 lesaber stalls while driving,,sometimes spedo jumps severaltime before it stalls,it dosent matter how fast or how long i drive ..fuel pressure ok coilpacks new filter plugs n wires...i think the...

if its a 3.8 liter pull off the vacuum hose on your fuel pressure regulator. if you get a hand full of gas after it stalls , thats your problem!! $45.00 at part store , just a snapring pliers to change it!! richie

Oct 05, 2009 | 1994 Buick LeSabre

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Will not start unless press gas pedal

what happens when it does finally run, does it run rough, black smoke?? if the fuel pressure regulator is leaking it COULD causet his problem. Find the regulator and take the vac hose off, if there is fuel in the hose, replace the fuel pressure regulator.

Sep 21, 2009 | 1991 Buick LeSabre

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My 94 LeSabre has a about 34 pounds of preasure in the fuel line by the engine and as soon as I step on the gas it drops down to 10 pounds. My mechanic thought it might be the diaphram above the fuel pump...

3 things it could be 1 the fuel pump itself 2 is the fuel filter could be restricted 3 is a bad fuel pressure regulator if the three have been tested and are good let me know and i will take you thru some more

Feb 20, 2009 | 1995 Buick LeSabre

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Fuel system

The fuel pressure regulator does have a history of leaking allowing fuel to be sucked into the engine causing a flooding concern. This can be checked by getting the vehicle up to normal temp, turning it off and removing the rubber hose that goes to the regulator ( located on the fuel rail closest to the front of the vehicle). While watching the nipple on the side of the regulator you should see fuel begin to come out of it. I have seen it pour out so be carefull, it is a possible fire hazard.

Jul 28, 2008 | 1998 Buick LeSabre

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