Question about 1991 Buick Century

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My 1991 Buick Century stalls a lot. I have replaced the plugs and wires, fuel filter and pump, and coils and injectors. What else is there? There seems to be a lot of people complaining about these buicks.

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  • Zaraki Sep 15, 2010

    Does it stall usually after the vehicle warms up and the engine gets hot?

  • jbcatbob Sep 15, 2010

    Nope. When it's first cranked up it does or when taking off or going under 50.

  • jbcatbob Sep 15, 2010

    It doesn't matter if its cold or been running for awhile. Seems to run fine when going 70-75 mph. But slower speeds are asking for stalling problems. Or coming to a complete stop and taking off.

  • Zaraki Sep 16, 2010

    Check the air induction system for any air or vacuum leaks, and if the vehicle is equipped with a MAF sensor, (Mass Air Flow) and that vehicle should be equipped with one, then be certain that there is no air or vacuum leaks in the air induction system, and that all of the hose clamps are good and tight on the air induction system., especially between the MAF sensor and the throttle body. There can be no un-metered air getting past the MAF sensor or the engine can have performance and/or stalling problems. The MAF sensor is usually located at the air cleaner assembly, or it will be just down stream from it, and the MAF sensor will always be located in the air induction system between the air cleaner assembly and the throttle body.

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You might want to replace the fuel pressure regulator....

Posted on Dec 15, 2011

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Posted on Apr 24, 2011

  • jamesbeen76 Apr 24, 2011

    it starts good when i hit the gas it dies

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1 Answer

1991 Buick Century Limited 3.3L, 94,300 miles; stalls under load.


There should be a purple wire with white tracer from ignition module to computer. That wire carries rpm signal to computer, w/o that signal, the computer won't ground the fuel injectors. With the engine cranking, you look for a dc pulse on that wire. If you have a digital multimeter that has a tach--duty cycle or dwell setting, it should react to a dc pulse.
My info on your model year, isn't that great.

Apr 27, 2017 | 1991 Buick Century

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I am driving a 91 Buick Century that seems to have a fuel problem. It wants to sput and sputter when it gets to just at half a tank of fuel. It does not matter what gas station I get the fuel from. It...


Did you replace the fuel filter also? Have fuel pressure checked, new pump does not always equal good pump, have gotten bad ones before. Check / replace gas cap- may not be holding correct pressure in tank. Or, the seal on the fuel pump hole may not have sealed. Occasionally, the choking and sputtering as well as a pop or hesitation can be caused by a bad catalytic converter. If the converter is plugged, it will choke your engine out due to back compression. A 1991 car with a rusted muffler would prompt me to check out the converter as it is most likely bad also and could be the root cause of your problem. Good exhaust is essential to good performance.

Jun 09, 2011 | 1991 Buick Century

1 Answer

My Buick Century has started to run a little rough and going through gas more. Besides just the spark plugs and tune up, what could the problem be? Seems as though there is interference with air flow.


running rough, could be a few possible things besides spark plugs, and wires!
air filter, fuel filter, fuel injectors, fuel pump, coil pack, Etc.
Id start with the air and fuel filters!
Good luck, Hope this helps!

Jan 21, 2011 | 2002 Buick Century

1 Answer

Fuel pump need replacing 1991 Buick century, where can i find it?


I'm sorry to hear that. The fuel pump is in the fuel tank. Make certain that all the rest of the fuel system working before you have to drop the tank. 1.Fuel pump relay or any fuses.2.Replace fuel filter,(inline between tank ane pressure regulator). 3.Trace power and ground wires from tank back to relay looking for breaks or pinches. 4.Look for a pump reset switch. If all that is good, then replace the pump. Good luck.

Aug 08, 2010 | 1991 Buick Century

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1993 Buick Century, what makes the car stall when giving it gas, and engine seems to want to stop, if no gas is getting through. Other keep saying check gas filter, fuel pump or relay. by the way where is...


The relay, if it has electric fuel pump, is in the engine compartment either mounted on the sides or firewall or in a fuse box in the compartment. Check your timing and run carburetor/Injector cleaner cleaner though the engine. Try replacing plugs, wires, distributor cap and rotor as well. It sounds as if you are flooding not running out of fuel.

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1 Answer

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first make sure you are up on your maintainence.. plugs, wires, fuel filter, etc.. sounds like a fuel issue I would recommend running a fuel pressure test first..

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1 Answer

My 89 buick century keeps stalling


Give it a tune-up get the good stuff.
  1. Air Filter
  2. Fuel Filter
  3. Ignition Coils
  4. Spark Plugs
  5. Plug Cables
  6. Engine Oil Filter
  7. Engine Oil
Three to five, good ignition components are cheaper on-line the other stuff you should get at your local auto parts store.

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2 Answers

1991 buick century no start replaced fuel pump and harmonic pully sensor and plugs no start


Have you checked for spark? Will it start if you spray carb cleaner in the intake?

May 16, 2009 | 1991 Buick Century

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