Question about 1990 Buick Century

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Fuel Pressure Regulator

I do i take of a fuel pressure regulator on a 90 Buick Century

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  • Anonymous Mar 18, 2014

    how to check the fuel pressure regulator

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All Fuel Pressure Regulators are usually attached to the Fuel Rail. In any case, they have a return line to the fuel tank. On your engine you may have to remove the pretty "Plastic Cover" that covers the top of the engine to see the fuel rail and the pressure regulator. Look for a "tube" that has fuel injectors going from the bottom of it and into the top of the intake manifold. The fuel pressure regulator is a round looking device attached to the end of the fuel rail with a small fuel line coming out the botttom and a vacuum line attached to the top of it. At least in most cases this is what it will look like.

Posted on Aug 18, 2008

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  • Master
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If its a 3.3 you need a TORX screwdriver to take the two screws out of the regulator, then disconnect the fuel line, actually take the fuel rail off then disconnect the line then the screws.

Posted on Aug 18, 2008

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1 Answer

I've got a 1995 buick century special it acts like it flooding out while running. what's wrong?


You'll need to check fuel pressure with a gauge and check the plugs to see if they are fuel soaked. Could be a faulty injector or fuel pressure regulator if it is getting too much fuel.

Aug 26, 2014 | 1995 Buick Century

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Where is the fuel pressure regulator on a 1990 buick century


The fuel pressure regulator is on the fuel rail near the injectors.

Apr 20, 2013 | Buick Century Cars & Trucks

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How to replace fuel pressure regulator on 1999 buick 3.1 v6


There not bad to replace, but you do have to have a special tool to unhook the fuel lines to it. And there should be just one set of wires goin to it also. It should take you about 20 minutes to change. If you have the right tools to do it.

Dec 04, 2012 | 1999 Buick Century

1 Answer

99 buick start easy then dies unless you give it gas. then stays running until you go to start again.


Check the fuel pressure regulator. It is on the drivers side, front of the engine near the throttle body. Remove the vacuum hose and see if fuel comes out of the nipple. If it does than the regulator needs to be replaced.

If the regulator is fine than you will need to check fuel pressure with a gauge. If fuel pressure drops as soon as you shut off the car than the fuel pump is likely bad.

Jul 26, 2012 | 1999 Buick Century

1 Answer

1990 buick century limited/ v-6 engine has fuel in the oil. need a fix.


could be a bad fuel pressure regulator. if they do fail, then it may result in low pressure. Mostly, the diaphragm in the fuel pressure regulator develops a leakage and the fuel enters the vacuum hose. This may lead to various kinds of troubles in the engine. Signs of a Bad Fuel Pressure Regulator
  • The vehicle engine runs rough and often stumbles and sputters.
  • The engine will not start after ignition. Usually, this problem is encountered in the morning when you start your vehicle. Many times, the engine starts, but stalls shortly after starting.
  • The fuel pump in the vehicle becomes noisy at times.
  • A bad fuel pressure regulator can also result in fouled spark plugs.
  • Last but not the least, the fuel mileage of the engine decreases noticeably. if above signs appear, replace fuel regulator. Check the oil dipstick and see if you smell fuel on it. If you do, it could be a symptom of a bad fuel regulator. The regulator has allowed gasoline to leak into the oil system.


Feb 05, 2012 | Cars & Trucks

1 Answer

I have a 1990 Buick century, that will not start, i have changed the ignition module, fuel regulator, plugs and wires, fuel filter. When changed the fuel regulator it started and ran great, shut it off and...


Sounds like your fuel pump is weak so i would check the fuel pressure first.The fuel pressure should be 40-47 psi with key on and engine off and 31-44 psi with engine running.If its not within these specs then replace the fuel pump.

Aug 04, 2011 | 1990 Buick Century

2 Answers

Fuel Pump Regulator on 2003 Buick Century 6 cyclinder. How much trouble is it to replace?


easy,it's on the fuel rail,make sure that is the problem and not the pump,check fuel pressure before the regulator.











TIM..........

Oct 25, 2010 | 2003 Buick Century

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