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 start....it 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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Posted on Jan 02, 2017

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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 .

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97 park ave ultra is hesitatating when I start using the gas as I start an incline mostly but sometimes just randomly an it's getting worse


Engine Stalling Due to Mass Air Flow/Crankshift Position ...

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Buick Park Avenue Engine Stalling Due to Mass Air Flow/Crankshift Position Sensor Failure. This is a verified ... 1997 Buick Park Avenue- 3.8L V6160,000Visitor. Engine stalls ... car runs then stalls and won't start for thirty minutes. Upvote (36).

Buick stuttering Questions & Answers - Fixya

www.fixya.com > Forum > Tags > stuttering
94 Buick Park Avenue that stutters under a light load I have a 94 Buick Park Avenuethat ... Buick Century 97 runs rough and stutters when cold and gas applie Engine runs rough ... I have a 1994 buick lesabre it starts ok but stutters and stalls.

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

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

1 Answer

1995 buick riviera 3.8 supercharged engine. Cold start issue. have to restart multiple times and it barely runs...spits back again and again until the engine warms up. once warm it runs correctly and...


Hello lysiphlebus2,

((My thoughts: cold START valve IAC at very bottom))

Plenty of places will do FREE diagnostic code reads.

I would rather suggest it be a muffler shop than
AUTOZONE... but either is better than guessing.

AUTOZONE will likely make you buy OXYGEN
sensors... (but that makes about as much sense as
buying a new THERMOMETER every-time you
have a FEVER.

What you are describing sounds (from an old
mechanic's perspective) like a collapsing
catalytic convertor or rotted muffler baffle
(a slightly better blockage will halt operation
completely)...

((again speculation... get your codes read))...

Do not buy OXYGEN SENSORS....

Know your prices before waltzing into any
exhaust shop.

AMAZON
1 24 of 108 results for Automotive 1995 riviera catalytic 1995 riviera...

rockauto
1995 BUICK RIVIERA 3 8L V6 Supercharged Catalytic Converter RockAuto

IAC (cold start valve)
1995 BUICK RIVIERA 3 8L V6 Supercharged Idle Air Control IAC Valve RockAuto

Hope this helps

Carnac the Magnificent

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1 Answer

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.

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2 Answers

1996 buick century stalls only when there is moisture or rain


EGR and EVAP systems are tow different operations
fixing what you did doesn't fix the code revealed

Jun 09, 2017 | 1996 Buick Century

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