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Buick engine repair questions and answers

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  • sweet
    sweet - 1992 Buick Roadmaster - Engine - 10/26/2010
    "PLEASE tell me why does my car die out when im not on the accelerator,for example if im in a long slow line of traffic?
    Im not sure of themileage but i already tried the following items map sensor, oxygen sensor, Computer, Fuel Pump Relay, Fuel Pump, Oil Senit unit Switch, fuel filter, it happens no matter if the vehicle is cold or warm, but only when the vehicle is rolling and i am ...
    • yboy82
      10/26/2010 yboy82
      Check the condition of your spark plugs (clean and adjust the gap if needed) and plug wires? It is also possible that your TPS is out of adjustment (adjust to specification). You should also check the condition of your idle air control valve/idle speed actuator/idle stop solenoid. Diagnose your vehicle with a scan tool to know if there is a stored trouble code in your vehicle, even if your check engine light is off there’s still a possibility that you have a check engine light and the only way to verify it is to diagnose your vehicle with a scan tool.
  • j
    j - 1999 Buick Century - Engine - 10/25/2010
    Where is the thermostat located
    • RC
      10/25/2010 RC
      On the engine block at the end of the upper radiator hose.
  • robert duffy
    robert duffy - 1991 Buick Riviera - Engine - 10/24/2010
    Do i need ign. mod. or is there another problem
    engine died while driving. ign. mod. fuse blown (replaced) blows again disconnected ign. mod. blew fuse again
    • HouseCallAuto
      10/24/2010 HouseCallAuto
      Try disconnecting first the fuel pump and see if the fuse still blows. This fuse powers the fuel pump and the ignition module and the fuel injectors and also the oil pressure sending unit. You have to disconnect each thing and try a fuse.
  • Cary
    Cary - 2006 Buick Rendezvous - Engine - 10/23/2010
    Engine shutoff while driving.
    While driving the engine simply quit, like it was shut off. Motor will turn over but won't fire.
    • DrkShdw983
      10/23/2010 DrkShdw983
      Well you have two systems to check: Fuel delivery, and spark. I would guess it's more likely to be a fuel delivery problem so here's a checklist of things to check. Follow it in order for the best results.

      1.) Fuel pump: easiest way to check this is to open your gas cap and listen. While you're listening have a friend turn the key to the on position but do not attempt to start the car. If the fuel pump is working (or at least trying to) you'll hear a buzz noise for a few seconds, then it will shut off. If you don't hear anything than replace your fuel pump.

      2.) Battery: Have the battery load tested for free at a local auto store. Replace it if fails the test.

      3.) Fuel pressure regulator: Unfortunately this can be pretty hard to check. The only way I'm aware of is to hook a fuel pressure gauge up (after verifying that the pump isn't the problem).

      4.) Injectors: It's unlikely but not impossible that all the injectors are clogged or not working. This would definitely throw a check engine light so if yours is on than have the code read.

      5.) Ignition coil(s): I believe these can be tested for free at your local auto parts store. You'll have to ask around.

      6.) Spark plug wires: Make sure there's no corrosion, cracked or missing pieces of insulation, or loose connections.

      7.) Spark plugs: Look for burn marks and corrosion. These are a cheap fix so if there's any doubt, replace them.

      Hope this helps!
  • 90 regal owner
    90 regal owner - 1990 Buick Regal - Engine - 10/22/2010
    Vehicle stalling and starts again and seems like the engine loads up while check engine light is on. o2 sensor maybe?
    car has 130k miles on it. check engine light comes on at times and car runs very rough. it will stall and i can get it started again and it runs very rough. later check engine light goes out and car runs fine
    • Bobby
      10/22/2010 Bobby
      i doubt it is the o2 these early o2's were only used to monitor catalyst efficiency. I would start checking egr, maf sesnor, throttle position sensor. if you can find someone who has a scanner capable of reading obd1 codes for gm then that will help greatly. it could also be missfiring, when was last time spark plugs wires were changed? these also tend to have problems with the coils and ignition module. so check for spark first to see if there is misfiring
    • HouseCallAuto
      10/22/2010 HouseCallAuto
      Read the codes using the method described here >>

      And then repost with codes. Take your time, reading them can be tricky and you can repeat the flash sequence over and over. Like Bobby said, if it has been a long while since a plug and wire change, do that first, however the stalling has another cause. The rough running could be caused by a bad ignition wire on even one cylinder, but the stalling you detail could be a crankshaft position sensor, ignition module, EGR valve or even a bad ECM. Check codes first, write them down, then disconnect the battery for a minute then run the engine again for a while and recheck the codes to see which ones returned.
  • mia1017
    mia1017 - 1997 Buick LeSabre - Engine - 10/22/2010
    Why does my buick all of a sudden while driving start to shake and flash all of the lights
    Usually its when it gets wet or I hit a bump but sometimes just randomly it will act possessed basically. The lights on the dashboard, the clock, radio and headlights start flashing and then the car stalls. Most of the time I can get it running again right away but ...
    • Bobby
      3/17/2010 Bobby
      Interestig problem, when the lights start flasing, do they have to be on or do say the headlights and radio start flashing even if they are off? If its that all these things are on and they start flickering off that can maybe lead somewhere. Wiring could be loose and when it shakes it looses the connection... Still the headlights and radio flickering points me in the direction that the car is loosing voltage, maybe an intermittent alternator problem. Try having the alternator tested and see if there are any sudden amp/voltage drops.
    • john
      3/18/2010 john
      have the starter checked or replaced . starter may be starting car good but if it has a short in it when you hit a bump it looses it power conection
    • JimmyMustang
      3/18/2010 JimmyMustang
      Researched this problem a bit more, and you could have multiple problems thats why this is so difficult to pinpoint. There are other people that have experienced the stalling and it was caused by the temperature sensor. The temp sensor sends info to the computer to control idle. But the Lights flashing on and off indicate a loss of voltage somwhere like Bobby was saying. I wouldn't say this is related to the starter the starter does just that it starts the vehicle and then its job is done. If the engine is cranking then the starter is working properly.
    • reggies1
      10/22/2010 reggies1
      about the lights only, i had a bad side terminal connector on my battery, lights flashing lijke a christmas tree. replaced the screw that went into the terminal and that took care of the flashing lights, like I said lights only. hope this helps abit
    BROOKS - 1995 Buick LeSabre - Engine - 10/22/2010
    • matt
      10/22/2010 matt
      go up one side. you need 2 check oil pump also, or replace it, its got 2 be blead..
  • reggies1
    reggies1 - 1997 Buick LeSabre - Engine - 10/22/2010
    Trouble codes on my scantool
    trying to find out what code-p1441 on my scan tool, it's inexpensive
    • Mike
      10/22/2010 Mike
      EVAP system flow during non-purge conditions
      10/22/2010 reggies1
      thanks, code for evap was taken care of (code p0446)
      10/22/2010 reggies1
      so i found out both codes are evap related thank u
    • matt
      10/22/2010 matt
      try this, put your code in ,you will find what you need
      10/22/2010 reggies1
      thanks for the site, going there now
  • mike
    mike - 1995 Buick Regal - Engine - 10/22/2010
    My coolant light comes on and none of my fans work
    126000 miles i replaced the pvc valve
    • mike
      10/22/2010 mike
      is it a sensor on the radiator
      10/22/2010 mike
      if the thermostat is bad will it keep both of my fams from comming on
  • william
    william - 1997 Buick LeSabre - Engine - 10/22/2010
    Cold air in winter hot air in summer
    90,000 miles
    • gerry comer
      10/22/2010 gerry comer
      need more details,have you checked thermostat or AC expansion valve
  • Ricko
    Ricko - 2000 Buick Regal - Engine - 10/21/2010
    Regal GS. fianally got an error code. Missing /running rough very inconsistant. code was "mass air frequence low"
    The problem seems to surface when engine is warm or under load. A real tough one to solve ! Mass air moldule tested OK. Plugs and wires changed. Ignition module checked.
    • AWACS E3 Sentry
      10/21/2010 AWACS E3 Sentry
      I believe you got the P0102 DTC, in this case, your MAF can be disconnected, dirty, faulty. What you dont want to happen is your ECU is busted, but dont worry, its a very rare case
    • HouseCallAuto
      10/21/2010 HouseCallAuto
      Replace the MAF sensor after trying to clean it. The cleaning may not help. Probability is greater than 90% if the code is a P0102.
      11/4/2010 Ricko
      Replaced MAF as you suggested and running good so far. It was replaced once before but box appeared open and I believe the part was returned bad. Thanks
  • gerry comer
    gerry comer - 1995 Buick LeSabre - Engine - 10/21/2010
    Car acts like a shortin wiring horn blows when battery connect replaced brain box code driver1&2 input high voltage,1640
    and 1650 was also code 1610 they said it was computer car does not shift out of foward gears used the chip out of used comp. car shifted wrong chid made other codes show up but tranny shifted,could it be my computer chip,or are codes 1640,1650 shift modules no one ...
    0 answer
  • uzimoore26
    • HouseCallAuto
      10/20/2010 HouseCallAuto
      Apparently nobody is taking you seriously because if one of my customers gave me their 97 Park Ave and said fix my light it would be fixed and billed. Maybe they don't know what to do. Try a different shop? Or try it yourself. Buy a $50 code reader, attach it to the diagnostic connector under the driver side dash and read the fault codes and then repost with those codes and we can help.
  • Joe
      10/19/2010 MOONSTER_TOOLZ
      The fuse or the dash voltage regulator or the gauge is defective. Most likely replacement is the best way to resolve this.
    • david
      10/19/2010 david
      fuel sender unit in the fuel tank in bad replace sender unit and fuel pump to fix
  • burke
    burke - 1999 Buick Park Avenue - Engine - 10/19/2010
    • HouseCallAuto
      10/19/2010 HouseCallAuto
      Under the car along the LH frame rail. Great idea to replace it if it has been in there for more than 30K. It will not likely solve your stall unless the filter is totally clogged where you cannot blow your breath through it after you remove it.