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Buick engine repair questions and answers

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  • Forzoma
    Forzoma - 1990 Buick LeSabre - Engine - 9/24/2014
    90 Buick LeSabre runs rough and sounds like it has no oil (loud and choppy) but has oil.
    I have a 1990 Buick leSabre Custom after driving with no issue, i downshifted to 2nd to pass a car afterwords it became very rough as if there was no oil, after checking all the fluids and seeing no issue i let it cool down before driving, started up fine but with a ...
    0 answer
  • rbsutherland
    rbsutherland - 2005 Buick LeSabre - Engine - 9/21/2014
    My car stumbles intermittenly,
    My car has 75000 miles on it. In the last 4 months it has stalled while driving and will not start. After 2 new ignition control modules, 2 new crankshaft position sensors and new ignition control modules the 3rd set it no longer stalls completely. However I get a ...
    • Jimm
      9/21/2014 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
  • Gary Clark
    Gary Clark - 1991 Buick Park Avenue - Engine - 9/14/2014
    Car will not start. Doesn't seem to have any spark. It just grinds when trying to start it. Starter has been replaced.
    Before the car stopped running the motor ran rough as if it was missing. The check engine is not on.
    • Jimm
      9/14/2014 Jimm
      First question - is there spark at the plugs? If yes,then is there fuel to each cylinder? Need to answer / establish basic conditions as the first steps.
  • jbours02
    jbours02 - 2005 Buick LeSabre - Engine - 9/14/2014
    Loud engine knocking/shaking
    I'm experiencing loud engine knocking and shaking as well as a strong gasoline smell. The check engine light is on solid, but blinks while driving. There is also very little power while driving; the gas pedal is to the floor and acceleration is very minimal.
    • Jimm
      9/14/2014 Jimm
      The check engine light is located on the dash and stays on if the computerized engine control system detects an engine performance or emissions problem.

      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.
  • Pete Stone
    Pete Stone - 2002 Buick Regal - Engine - 9/11/2014
    Car starts but dies shortly after
    has new filter and fuel pump
    0 answer
  • badgirlhero
    badgirlhero - 1996 Buick Century - Engine - 9/10/2014
    Acceleration/hesitation problem caused by/causing back pressure problem
    I have been having problems with my buick century not accelrating well and i have tried a few fixes with no good ending. So far i have replaced plugs, wires, air filter, throttle postion sensor, and mass air flow sensor. After that i took it into a shop to look at ...
    0 answer
  • HB
    HB - 2002 Buick Century - Engine - 9/10/2014
    Lack of acceleration
    Just purchased 2002 Buick Century, 51k miles. If I try to accelerate from a stopped position, no matter how much I press on the gas, the car goes so slowly (about 20 mph)and takes a while before it picks up any speed. Much worse if I am going up an incline. Doesn't ...
    • jdl
      9/10/2014 jdl
      How long since a tune-up? Check fuel pressure, use a gage. Also, check to see if pressure holds for bit, with everything off. I always check for codes, even if the lite isn't on. I've had inactive codes point me in the right direction. Some of the national brand autostores will check codes for free.

      You don't think it is a tranny issue?
  • Mike
    Mike - 1994 Buick Park Avenue - Engine - 9/8/2014
    Cruise control will not stay at selected speed.
    The cruise control works fine when there is no strain on it. But when going up a hill it will not keep up to speed selected, it doesn't drop completely out just starts going slower. After car starts going slower If you put the accelerator down to help, then let off ...
    0 answer
  • knowdealneil
    knowdealneil - 2000 Buick Regal - Engine - 9/4/2014
    What is possible problem
    service engine light soon has been on for a week, add coolant light is flashing. have service radiator; water pump works, thermostat works, engine does not over heat. system has problem from start up, oil change 7/1/14 and is clean. what could problem be?
    • lesabre man
      9/4/2014 lesabre man
      Have someone hook a scan tool to your vehicle and see exactly what codes you are getting, but you could also test the coolant temp sensor. Sounds fairly simple, with a little more information.
  • lesabre man
    lesabre man - 1995 Buick LeSabre - Engine - 9/2/2014
    Lesabre just stalls sporadically, then starts right back up.
    Have replaced crank sensor, harmonic balancer, MAF sensor, 02 sensor, fuel regulator, and tested IAC and MAP sensors. Fuel pressures are all good. New fuel filter, air cleaner and spark plugs as well. Removed entire throttle body and completely cleaned it too. Car ...
    0 answer
  • Fudge
    Fudge - 2000 Buick Century - Engine - 9/1/2014
    Why is my car revving in park?
    Sometimes when my Buick century is in park it will begin to rev, or when I'm driving, around 30mph, I have to ride my brakes the whole time to stay at the speed limit.
    0 answer
  • stan
    stan - 1991 Buick Skylark - Engine - 8/31/2014
    Code 15 open circut, mechanic says i have an open circut
    cooling fan runs constantly,replaced temp sensor, mechanic says open circut
    0 answer
  • adavis219
    adavis219 - 1998 Buick Century - Engine - 8/30/2014
    Does a large gray cloud from my exhaust mean head gaskets?
    I just let a friend try to replace my LIM gaskets but he didn't do it properly so the didn't seal. Having misplaced faith in him, i did not realize it right away. On the cars first start after the LIM job it started up, sounded good, but then died cause it was out ...
    0 answer
  • Shyenne
    Shyenne - 1987 Buick Century - Engine - 8/28/2014
    Why is my car revving up and down and dying when I turn the headlights on and push the brakes?
    The mileage is 91,615. We thought it was the brake switch so we got a new one and it is still acting the way it was before. When we take the brake switch out though, the car runs better. It does it during the day and night. Sometimes the car will die while we are ...
    • jdl
      8/28/2014 jdl
      I'd have to make sure the battery and charging system are working ok. Check battery wiring,cables, also. I believe some of the national brand auto stores will check those systems for free.

      Check for applicable trouble codes, your obd1 so you should be able to check codes, yourself. To check codes, use a jumper wire between the A & B terminals at the data link connector, lower edge of dash. Turn key just till the dash light come on, no further. The mil on the dash starts flashing, you count the flashes to get the codes. Your looking for two digit codes.

      Check your map sensor. How long since a tune-up?
  • rbsutherland
    rbsutherland - 2005 Buick LeSabre - Engine - 8/24/2014
    Engine will not start
    2 crankshaft position sensors have been replaced 1st one lasted 2 months the second replaced 1 month later. The coils were also replaced at the that time. Now 1 month later the engine will not start. 74000 miles. Engines always died while running. AAA roadside ...
    • jdl
      8/24/2014 jdl
      Did you find a crank sensor trouble code? What was the code number? Are you using quality parts? Did you check wiring connector and wiring circuits? Also check the trigger for the crank sensor. Check the camshaft position sensor and circuitry,

      At the crank sensor connector, you can check ref voltage--ground and signal.