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Buick engine repair questions and answers

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  • 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.
    STACY EJLKS - 1993 Buick Roadmaster - Engine - 10/19/2010
    Why does my oil pressure stay on zero sometimes, could my oil pump be stopped up
    this happens all the time, its like i dont have any power and cant pick up any speed
      10/19/2010 MOONSTER_TOOLZ
      Did you check the condition of your engine oil if low of contaminated? Add oil or change the oil with filter if necessary. Check also if air filter is blocked. When the last time you replace the fuel filter, maybe it needs to be changed. Inspect all above recommendation and correct it. If problem persists just post another question with its details.
  • kkey
    kkey - 2001 Buick Regal - Engine - 10/19/2010
    How do i check my fuel pump to see if it's defective?
      10/19/2010 MOONSTER_TOOLZ
      First check the fuel pump relay, here it is;

      Faulty Fuel Pump Relay Symptoms

      To identify the malfunctioning symptoms of any car part, you must observe its effect on working of connected parts. Every part of the engine assembly is linked to the working of other parts. So bad fuel pump symptoms can be identified by the effect of the relay malfunctioning on connected parts like the fuel pump and the car engine. Here are the prime bad fuel pump relay symptoms:

      Engine Goes On a Strike
      One of the symptoms of a faulty bad fuel pump relay is the engine cranking up but not starting. This point towards a problem with the fuel delivery system and it may be that the fuel pump relay, which is the culprit.

      Erratic Engine Function and Delayed Start
      Erratic functioning of the engine at the start and delay in starting up can be an indication of a faulty fuel pump relay. That is why; if you consistently notice a delay in engine starting, check the fuel pump relay.

      Absence of Fuel Pump Working Sound
      Once the relay stops functioning, the fuel pump will not switch on and the familiar sound of fuel pump working will not be heard. Ears trained to hear the normal sounds made by the car at start will notice the difference.


      Symptoms of a Bad Fuel Pump

      Fuel pumps stop working due to a variety of reasons. Once this happens, the supply to the injectors is automatically stalled and the vehicle stalls as well. The effect is similar to the problem of running out of gas. Another problem associated with the pump is proper functioning of the electrical mechanism of the pumping system. The electrical supply consists of devices like the relay and the fuse. If the fuse or the relay develops problems or blows off, it will again result in breakdown, as the driving mechanism for fuel supply is cut off.

      Another reason of a bad fuel pump is overheating. If the fuel pump gets heated frequently and within few minutes of turning on the vehicle power, it is a sign that the pump needs replacement. A bad fuel pump will also show signs of frequent stopping or intermittent breakdown. It will work for around 15-20 minutes and stop working. Once, the vehicle is allowed to remain idle for around 30 minutes, the engine gets cooled off and the pump functions normally. Such a problem is an indicative sign of a bad fuel pump.

      If the flow to the fuel injection system is not constant, the engine may develop problems. Signs include a hesitant start or a stumbling problem on ignition. If small, unwanted debris or grainy particles enter the pumping system it can cause vehicle breakdown, thus, abrupt stopping of a vehicle can also be considered a symptom of a bad fuel pump. If the filtering mechanism develops a problem or gets struck up with impurities, the engine will show symptoms like rough firing and fickle working. A reduction or drop in fuel supply to the engine causes symptoms of a low power engine and working problems if the problem persists for a long time.
  • Charles
    Charles - 1998 Buick Regal - Engine - 10/19/2010
    How to remove and replace valve covers
    gaskets are worn..oil leaks on to the engine.
  • brandolf
    brandolf - 1987 Buick Century - Engine - 10/19/2010
    Car starts and runs great until i cut it off and start it back then it wants to cut off when i stop
    it all started when the car over heated
      10/19/2010 MOONSTER_TOOLZ
      Perhaps the engine is overheating, that's why your engine stalls. Check the coolant level if correct adds if necessary. Conduct radiator pressure test to determine if there's a leak in the system; also a compression test for the combustion chamber. Check also the condition of your spark plugs may be they are worn to excess.
  • Ray
    Ray - 1988 Buick Reatta - Engine - 10/18/2010
    I hear a squeal in the engine compartment just after starting the vehicle. could this be the A/C clutch?
    the noise stops within two seconds after starting. the diagnostic center indicates low refrigerant and disengages the A/C.
    • Tifosi
      10/18/2010 Tifosi
      Its probably just a loose belt, i dont find any reason why your compressor will give a squealing sound because of low refrigerant.
  • clrominger
    clrominger - 1990 Buick Century - Engine - 10/18/2010
    No power out of coils
      10/18/2010 MOONSTER_TOOLZ
      Did you check the condition of your battery if it has a charge? Also its cables if properly fix and free from corrosions? Check the wiring from battery to starting motor as well as to the coils if worn or attachments is loose. If the coils are failing, replacement is necessary.
  • clrominger
    clrominger - 1990 Buick Century - Engine - 10/18/2010
    Will not start. rough idle...smelled gas....hesitation.....quit at 60 mph
      10/18/2010 MOONSTER_TOOLZ
      Did you checked the throttle position sensor if failing? You will need voltmeter to do this;
      •You need to disconnect the throttle sensor harness.
      •Open the throttle valve manually and check the resistance between the terminal 1 and 2 changes.
      •Check the resistance in three different positions of the accelerator pedal.
      •You may record a resistance of approximately 10-ohms when the accelerator is fully, 2 to 10-ohms partially depressed and 2-ohms when completely released.

      Check also the condition of your knock sensor.
  • craig
    craig - 1994 Buick Regal - Engine - 10/18/2010
    How to change heat core
  • Chell
    • HouseCallAuto
      10/18/2010 HouseCallAuto
      Driver side top of engine, has electrical connector attached. Just rearward of the throttle body intake. What is the problem you are trying to correct?
  • westy
    westy - 2001 Buick Century - Engine - 10/18/2010
    01 Buick century starts hard
    Just changed the starter and the EGR valvue
    • RC
      10/18/2010 RC
      If the engine cranks over slowly, check the battery.
    • westy
      10/18/2010 westy
      Its more like it isn't firing right away. We hold the gas pedal steady and then turn it over. We do this if the initial try of turning it over doesn't work..
  • rivermayor
    rivermayor - 1990 Buick Century - Engine - 10/17/2010
    I just had the fuel pump replaced and with in 3 days the car stopped running again.They replaced the fuel pump again.
    Said the fuel pump was defective. Now the tell me there is a short in an injector and that is what made the fuel pump go bad. Is this true?
    • HouseCallAuto
      10/16/2010 HouseCallAuto
      Does not sound right to me. Did they say this while they still had the car or do they still have the car and they are waiting for an ok from you to do add'l repairs?
      10/16/2010 rivermayor
      They still have the car and are waiting for me to respond
    • HouseCallAuto
      10/17/2010 HouseCallAuto
      I think the car never needed a fuel pump to begin with and now the same problem has reoccurred which they diagnosed as a bad fuel pump. The car could have shorted injectors, yes, that was not uncommon in '90 GM cars. But, it DID NOT cause the fuel pump to fail. Understand?
    • mopar
      10/17/2010 mopar
      a fuel pump will not short out an injector for one thing...i'd definitely get a second opinion.....they probably can't tell day from night
  • buxterb
    buxterb - 1997 Buick LeSabre - Engine - 10/17/2010
    On going check engine light code po177
    have had tune up w/new wires, fuel filter change new mas air flow module : mech. said oxygen sensors are switching ok now says o need a new fuel pump and strainer he said i had about 32 pfuel pressure what should i do this car has 89000 miles keep up maintenence ...
    • HouseCallAuto
      10/17/2010 HouseCallAuto
      I don't see P0177 as a valid code for this '97 Buick LeSabre 3.8 liter engine. I see P0171. At any rate, your 32psi of fuel pressure is low. It should be 45 psi at an idle and 52 psi under load. This low pressure would be responsible for lean codes setting (P0171) and hesitation. The fuel pump sounds likely, just make sure the fuel pressure regulator is OK first..
  • john
    john - 1998 Buick Park Avenue - Engine - 10/17/2010
    Where is the crankshaft position sensor locatrd on 98 pARK AVE?
    • david
      10/17/2010 david
      right front of engine behind balancer you have to pull balancer off to replace crank sensor
  • ed
    ed - 1997 Buick LeSabre - Engine - 10/16/2010
    Crank, no start. security light on for a couple of months. temp. display flashes. oil pres. needle very jumpy.
    no check engine light bulb test when starting. ignition key pellet or resistor was loose. tightened with super glue. don't know if decoder inside key cylinder is faulty or if pcm is bad. have been having gauges act very jumpy lately. filled tank half-way, after the ...
    • david
      10/16/2010 david
      you will have to carry it to dealer to get the key coded