Question about 1996 Buick Century

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1996 buick century 3.1 L, V6 starts but wont run. code showed mass air flow sensor. replaced it....same problem. when it does wil run very rough. but will not stay running. where do i find the fuel relay?

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  • sfb3dude Dec 19, 2008

    unplugged it still does the same thing

  • sfb3dude Dec 19, 2008

    will not stay running

  • sfb3dude Dec 19, 2008

    would like to know where the fuel relay is located to see if it is actually engaing to send voltage to the fuel pump.


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Unplug your mass mass air flow sensor an see what happens when running and let me know

Posted on Dec 19, 2008

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2002 Buick century starts andrives fine for an hour or so thenloose fuel pressure itwill sputter unlessmash the peddle even Stalls out at an idle sometimes if a drop it lower gear not as bad pls help

Bad mass air flow sensor maybe ! But that would be just a guess , Any number of sensors on your vehicle has the capability of breaking down when heated up . Taking the vehicle to a repair shop that has a professional type scan tool that can view engine sensor data while the problem is happening . They would be able to see sensor data drop out , go erratic etc... It's a lot better then replacing parts that don't fix the problem . There are videos on youtube showing how to test mass air flow sensor's and all the others , if you would like to go that route. Check out scanner Danner video's . He is a teacher and a professional Tech . Plus you can ask him questions .

Mar 22, 2017 | 2002 Buick Century

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Oct 30, 2015 | Cars & Trucks

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Where are the O2 sensors? I found one directly behing the spark plugs on the back.

The O2 sensor (2 on V engines) are in the exhaust system pipes before the catalytic converter, the next sensor is the efficiency monitor for the catalytic converter system it looks like a O2 sensor but performs a much different function as far as testing goes. The codes you have follow.

P0420 - Catalyst System Efficiency Below Threshold Bank 1
What does this mean? In most cases it means the catalytic converter is worn out and that is sensed by the catalyst monitor I spoke of earlier.

P0102 - Mass or Volume Air Flow Circuit Low Input
Faulty mass air flow sensor
- Dirty mass air flow sensor (located in the air intake hose to the engine from the air cleaner)
- Dirty air filter
- Mass air flow sensor harness is open or shorted
- Mass air flow sensor electrical circuit poor connection
- Intake air leaks

Nov 02, 2012 | 2003 Buick LeSabre

1 Answer

96 buick skylark runs about 3 seconds then dies.whats wrong?

Fuel pumps don't slowly go out, they either work or they don't. I recommend replacing the mass air flow sensor, which is the square metal piece that's mounted in the middle of the big air tube that runs from the air filter housing to the intake. I replace the front head on mine and during the reassembly, I forgot to plug the wire back into the MAF sensor and had a similar problem. I would have it tested first if possible. If u have any other questions abt this car, feel free to send em to me directly, especially if yours has the 3.1 V6.

Jan 27, 2012 | 1996 Buick Skylark

2 Answers

Low or no power, changed the mass air flow sensor? OBD showed a problem on left side cat converter? Runs good one day and bad the next. Problem started after hurricane. Acts like exhaust is plugged ...

If its showing a catalytic converter code,,dont keep replacing other sensors..Has nothing at all to do with the map or the mass air flow sensor...Likely its the cat is clogged..That code tells you that your cat is not doing its job..I would change that cat on that side,,and quit letting the mechanic throw parts on the car..Thats to expensive

Sep 24, 2011 | 2000 Buick Century

1 Answer

Need to locate the mass air flow sensor on a 2001 Buick 3.8 V6 so I can remove and clean

its near the throttle body, but its a waste of time to clean it, if its bad,cleaning wil not fix it. replace it.

Sep 21, 2011 | 2001 Buick Park Avenue

1 Answer

Have a 2000 lesabre custom with 77000 miles has a problem with stalling on occasion and sometimes is hard to start, after stalling may have to let it sit a few minutes before it will start it's been into...

We recently worked on a buick century with the same problem. we replaced the spark plugs and made sure the spark plug wires where on their tight and it ran like new. i hope this helps. BE CAREFUL AND DRIVE SAFE.

Apr 23, 2011 | 2000 Buick LeSabre

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When you start the car it turns over but as soon as you release the key it dies. the car is a 1987 cuick century 2.8liter v6

try rapping the mass air flow box located between the air filter box and throttle body assembly. if it affects running it's probably bad. VERY common problem. so common there may be a replacement chip for the inside of the computer that bypasses it altogether using the map sensor instead.

Sep 08, 2010 | Buick Century Cars & Trucks

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