Question about 2002 Buick LeSabre

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2002 buick lesabre 3800 starts but then stalls

Getting fuel have injector pulse and have spark. vehicle starts right up but after ingintion cyc;e stalls

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  • Buick Master
  • 11,573 Answers

William, Check for trouble codes to aide diagnosing, could your security light be on, try your spare key as the chip may be bad in the one you are trying to use. Possible MAF(Mass Air Flow Sensor) faulty, try unplugging and start. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Engine Won Stay Running Starts and Dies Trust My Mechanic

Mass Airflow Sensor An Easy Fix for Big Problems from Little Instrument

See Bad Mass Airflow Sensor Symptoms on YouFixCars com

https://answers.yahoo.com/question/index?qid=20070726173242AAHJ9BJ

Posted on Apr 24, 2016

  • William Rendon
    William Rendon Apr 25, 2016

    Well changed the ecm and no success. Will this ecm have to flash by the dealership

  • L Pfaff
    L Pfaff Apr 25, 2016

    William, did the MAF not fix the problem, The ECM will probably have to be flashed by dealer or a good Knowledge Tech who has a Tech 2 scan tool.https://www.youtube.com/watch?v=70_5IPKF...

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  • Buick Master
  • 3,469 Answers

Please add information and repost , how long before it stalls? when it stalls will it start up again immediately or do you need to leave it a while. is there any overheating associated with the stalling or does it just switch off with no other symptoms.
Does it run okay, i.e. smoothly?

can you please add as much further detail and repost your query..

might be something simpl but the additional info can help us work it out maybe, please post a fresh query

Posted on Apr 24, 2016

  • William Rendon
    William Rendon Apr 24, 2016

    When vehicle starts runs great bright injector pulse. But as soon as it starts the injector pulse get dim and spark tester keeps sparking. And dies.

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Posted on Jan 02, 2017

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1 Answer

1993 gm 3800 left bank disconnecting of plug wire and injection connector does not change idle, appears left bank is not working.. Compression good...


Did you test for spark? I would check spark and fuel pressure. OK, here's a little bit of working theory that'll help you to see the ‘why’ of the Noid light test.

Whether you're testing a No Start Condition or a Misfire Condition, you'll need to know if the cause of the problem is a lack of fuel. When your GM 3.8L (Buick, Chevrolet, Oldsmobile, Pontiac) does not start, it will be either because of a lack of fuel or spark. The same thing goes for when your GM 3.8L equipped car or mini-van is misfiring... that specific engine cylinder isn't contributing to engine power because it either lacks fuel or spark.

Now, since the above two conditions (No Start and Misfire) can be caused by any number of things... one of the things that has to be eliminated, from this list of possibles, is the fuel injector not getting power or the injector pulse signal (On/Off switching signal) from the vehicle's Computer.

This is where the fuel injector Noid light test comes in handy, because you're able to visually see if both of these signals are present or not. If no flashes, then now you know that you have to verify that the connector is getting power (12 Volts) and the injector pulse signal.

One thing to keep in mind, is that the fuel injector Noid light test does not test for a BAD fuel injector. But, is the first step in verifying if the fuel injector is BAD or not. For the fuel injector test tutorial.

May 07, 2017 | Cars & Trucks

1 Answer

Poor injector pulse


The infectors are a load which means the voltage drops in response to the work done, so yes that will fire the injectors. You have some other issue like low fuel pressure is my guess.

Apr 27, 2016 | 2002 Buick LeSabre

1 Answer

89 lesabre 3800 vin c bad crank sensor found replaced but still has no in injector pulse or spark?


the ignition module or distributer cap has issues-------the injector driver inside the computer cud be gitten hot etc which can cause shutdown-------get car scanned with a tech ll that runs a data stream to confirm

Sep 12, 2011 | 1989 Buick LeSabre

1 Answer

My 95 buick lesabre will not start , I have change to a new fuel pump and a new cam shaft sensor. The gas is getting to the fuel rail, I have spark on all six cylinders . If i spray gas in through the mass...


Thee are a couple of things left to check. One is to hook up a fuel pressure gauge to the fuel rail and see how much pressure your getting and compare it to specs. It maybe getting fuel there but not enough pressure. To see if the injectors are being pulsed you wil need a set of noid lights. You will unplug an injector and plug in the noid light. It will flash everytime that injector is pulsed. If it never flashes your injector drivers on the ecu are bad.

Sep 20, 2010 | 1995 Buick LeSabre

1 Answer

Wont start\good fuel pressure\good spark


Then the fuel injectors are not pulsing,replace the crankshaft sensor,it controls the spark,but also the pulse for the injectors.

Jan 30, 2010 | 2000 Buick LeSabre

1 Answer

1995 buick lesabre custom. has a new fuel


even if you have preasure in the line that does not mean you have fuel going into the engine. you should check the injectors to see if they are spraying and if not you need to check the injector pulse to find out if the PCM is sending the signal to them to spray. to check injector pulse you will need a noide light to test the pulse it the light lights up you have pulse, but easy way to check is pull an injector and turn the engine over see if it sprays.

Aug 24, 2009 | 1995 Buick LeSabre

1 Answer

Wont start


spark and fuel pressure at the times while it not starting? I hope so.
Will it start if you spray carb cleaner in the intake? If so we are dealing with an Injector issue Several injectors could be failing when hot It's very common also you need to hae a NOID light to verify that the injectors are being PULSED by the ECM if you have NOID and spark and fuel pressure then the only thing to do is while its stone cold. OHM all the fuel injectors and record all the reading for each cylinder.
Drive it then once it will not start, quickly do the ohms test again and record all readings again and any readings that are lower are likely bad injector windings and you need new injectors.
Any questions email me at fixincars@yahoo.com please rate this advice

Oct 03, 2008 | 1992 Buick LeSabre

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