Question about 1989 Buick LeSabre

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89 Buick LeSabre idle problem. Throwing 8-15 engine codes. Changes whenever I clear them, usually voltage related. Idles terrible and will shut off on hills. Changes how it runs every time

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There is no code 8 , codes start at 13

Posted on Oct 22, 2015


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Posted on Jan 02, 2017

  • 99 Answers

SOURCE: engine temp hot and heater not working

I'll see if I can help get you started. If you aren't planning on bringing the car to a shop allow me to recommend a Haynes or Chilton manual from an auto parts store, they are for your specific car and can tell you how to fix everything. Some libraries even have them so you can borrow them or make photocopies of specific pages.

The most obvious solution may be your engine coolant level is too low. Make sure the engine is cool (off for at least 4-6 hours or preferably overnight.) and check the fluid in the coolant reservoir. If you try to remove the cap while it is hot you will be burned, maybe even severely. Also, check the level of coolant in the radiator, following the same safety procedure.

Another issue may be in your thermostat. Not the one that controls the hot air, but the one in the engine that controls the amount of coolant being sent to the radiator to be cooled. This is a more advanced fix, probably best left to a mechanic, but if you are feeling adventurous, the manuals from above would walk you through nearly step-by-step. Make sure you read through them thoroughly before starting so you know exactly what you'll be doing.

The third issue may be in your coolant(water) pump. This is what actually moves the coolant around the engine and through the radiator so it can be cooled and take the heat away from the engine. If this is not working, you will not get any heat through the vents, and the temp would be abnormally high. Again, either a mechanic should take care of it for you(it may be expensive) or you can try one of the manuals. Although, it can get messy and you have to recycle the waste coolant properly(recycling plant) and remember that cars use a 50/50 mix of coolant and water, never 100% coolant nor 100% water.

Another issue may be a blocked heater core, or radiator. It is possible to do a radiator flush with a garden hose and some simple tools available at general merchandise stores (Sears, Wal*Mart, Target, K-Mart, etc.) But remember, you'll have to take the used coolant to a recycling facility, NEVER dump it down the drain in your house or on the street. The directions for a radiator flush are on the package with the tools. It is a simple and inexpensive fix, but least likely to be the cause (if it's a '97 and you've never done that, it may still be a good idea)

Finally, the only other suggestion I can make would be in the fans. There should be one or two fans near the front of the engine, just behind the radiator. If the fluid is normal and the car is hot, the fans should turn on. There are 2 main types of controls for the fans, first is an electronic fan that can turn on at any time, even with the engine off. Second is a fan connected to the engine directly through the front of the crank shaft or belts connecting it to the crank shaft. This is why if a belt breaks, you overheat, the alternator stops working (indicated by the red battery light in the dash), you may have a very difficult time steering(power steering pump quits), you'd have no A/C, and a couple other things may happen depending on the type of belts. Again, this is a job for a mechanic or if you plan to try to tackle the project yourself get help from the books. Just remember that a spinning fan can sever fingers, grab hair, and loose clothing. Make sure the car is off and the battery is disconnected, electric fans can turn on even with the car off.

I hope I could have helped you to pin-point the problem and good luck getting it fixed. Don't forget to rate! I take great pride in helping others and the best way to show your appreciation is with a good rating! Thank you!

Posted on Jan 07, 2009

  • 4669 Answers

SOURCE: 1989 lesabre engine codes

26 is a quad driver failure, 41 is a cam sensor failure. I can give you a test procedure for 26 but for 41 you likely need to replace the magnet that is in the cam gear for the cam sensor pick-up.

Posted on Mar 24, 2009

  • 1 Answer

SOURCE: When i start the car

could be the O2 sensors

Posted on May 06, 2009

  • 105 Answers

SOURCE: 2000 LeSabre starts but runs very rough and stalls. After

My 2002 Lesabre (app 115000 miles) started something like this. Also the loose gas cap had been coming on for quite a while. I replaced the vacuum line from the air intake to the fuel sensor. It is under the engine cover (twist off the oil filler to remove the cover). There are two hoses together that come of the air intake. The small one goes to the top of the engine. The other goes across the front and makes a 180 turn back to the sensor. Chances are the 180 piece is cracked. It all comes from the dealer as one unit. $25
Seems to have fixed my problems. So if your car is running a little rough. Shutters under load. If the gas cap loose is coming on or probably a number of symptoms this might be the answer. I would replace this item. A cheap try.

Posted on Mar 12, 2010

  • 524 Answers

SOURCE: 97 buick lesabre 3.8 Idles rough and stalls out.

Fuel injectors go bad on these engines, you can find re manned ones for 30 bucks. If you have an engine light on get that read. Change your coil/wires/plugs also. Is the lower intake manifold gasket leaking coolant yet? You may want to get that replaced also. Check the TPS too (throttle positioning sensor) those will also cause your engine to act up

Posted on May 08, 2010

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Missing terribly but runs. When put in gear it shuts off. What's wrong?

Buick LeSabre Questions - Running without a Mass Air Flow ... > Questions > Buick > LeSabre
CarGurusJun 11, 2013 - It drives perfect then all of a sudden while im driving it stallsoccasionally. ... it idles ruff an stalls until it warms up does the same in gear its throwing engine ... If you are installing a idle air control valve in a 1990 Buick Centuryyou ... I put in my 3rd MAF sensor in 2 weeks and now the car is no longer stalling.

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Whenever i turn the wheel on my 2000 buick lesabre, my car acts like it wants to shut off and sometimes while im driving it does shut off, but cranks rite back up! It also idles high sometimes. What could...

Well you have a three part part one the engine whats to shut off when you turn the wheel>there is a steering pressure switch located on the power hose line running to your power steering pump,,,it has an electrical connector make sure it hasn;t come loose or fuild leaking at base of switch or on top by connection...this switch sends a signal to your computer to increase the engine speed when the wheel is cranked so it doesn't stall ..Number 2 while driving shuts down can be a number of things but sort of relates to Number 3 idleing high sometimes...On your throttle body there is a component called a IAC sensor [idle air control} it should be tested sometimes the oring seal goes bad...also check condition of your air filter,if your vehicle has a MAF sensor {mass air flow } it also could be with your air filter off and engine running spray some THROTTLE body cleaner into the opening of throttle while increasing the Rpm's of the throttle...Hope this leads you the right way

Nov 08, 2010 | 2000 Buick LeSabre

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Upon startup engine idles rough then speeds up and returns to normal idle .After a couple of minutes the volt light comes on then no power then a complete shut down.Starts back up for a while then shuts...

OK, the volt light means that the alternator is not charging the battery. It could mean the battery is shorted out, or the battery is bad or low on charge due to an alternator not charging.

Replace the Alternator and battery as indicated by standard voltage output tests under load.

The computer in the car will not operate the engine properly on low voltage.

Fixing the charging system, may resolve the rough idle (meaning that it may be trying to relearn after data was erased by low voltage of the battery), and the speed up.

Try the charging system first, and once that is repaired, reevaluate the engine driveability and speed and idle smoothness, after it relearns.

Good luck on this repair.

Nov 06, 2010 | 1999 Buick LeSabre

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1987 Buick LeSabre is idling too fast

Check for vacuum leaks. I find mine with spray carbureter cleaner. Engine will speed up when leak is found. Check the hose from the cruise control to the three way tee. The black tee turns grey and falls apart resulting in a vacuum leak. Should be on drivers side firewall.

Jul 06, 2009 | 1987 Buick LeSabre

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94 Lesabre idles too high

you deffanitly have a vaccume leak somewhere.
it sounds like it might be an intake problem, check for leaks when engine is hot.

Mar 26, 2009 | 1994 Buick LeSabre

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My 95 Buick regal with 3.8 engine stalls while i am stopping.

when coasting to a stop do you have your foot on the brake
if so , test the brake booster for a vacuum leak
simple test
put the hand brake on and start the car
idles ok ,--no problems
put your foot on the brake
idles ok --not the booster
engine stalls , falters ---brake booster failure

Nov 25, 2017 | 1998 Buick Regal

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1997 buick lasabre custom

It sounds like you have a vacuum leak or intake gaskets leaking. Try this. Start the engine and let it reach the idle it want to go to. Get you a can of Brake Clean and spray it around the intake manifold (it on the top center of the engine, you may have to removed a plastic cover) If the engine idle changes up or down then the intake gaskets are leaking hence your vacuum leak. I hope this will help you.

Jan 04, 2009 | 1997 Buick LeSabre

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