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Buick LeSabre: Problem Codes/TSBs/Recalls

57 messages,  Last post on Aug 26, 2009 at 10:15 AM

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What is this discussion about? Buick LeSabre, Auto Repair, Sedan

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#28 of 57 Re: 1991 buick lesabre [imidazol97] by vance728 Jan 19, 2008 (6:15 pm)
Replying to: imidazol97 (Jan 19, 2008 4:19 pm) it has 79000 miles and the older gentleman said he serviced it regularly at the dealership. do you know anything about a product called no knock or something like that. if you do will it harm the engine. also everybody is saying they are getting 25-30 mpg. on ther'e 91 buick just like mine 3.8     i put spark plugs in it. what can i do to tune it up to get optimum gas mileage.
#29 of 57 Re: 1991 buick lesabre [vance728] by imidazol97 Jan 19, 2008 (6:24 pm)
Replying to: vance728 (Jan 19, 2008 3:41 pm) At 79000 and regular service I'd want to find out what it was. The sensor for oil pressure could be bad. The oil changes he did might have been 7500 miles instead of 3500. The knock could be something other than lower engine problems. Could be a crankshaft balancer. Is it erratic or constant with ignition firing?   If you know which dealer did the service, I'd go back and ask them about the records for the vehicle. And I think it would be well worth having them check what's the problem.   Listen with a broomstick or long piece of wood to where it comes from in the motor. Be careful of belts and moving parts. Change the oil and put in fresh oil. Take off the serpentine belt and spin and push and pull on each of the pulleys to look for one of those giving trouble. Check the idler pulley really carefully. They usually give a squeal or rushing noise on newer 3800s but you could have a pulley on an accessory bad.
#30 of 57 1991 buick lesabre tune up by vance728 Jan 19, 2008 (6:43 pm)
what do i need to do to get optimum gas mileage on this car. i put new plugs in and it gave me a couple more mpgs.. what else do i need to do. i was posting this question while editing my reply to imidazol and he answered my question before i finished editing it which was great. he's fast. by the way thanks imidazol Replies to this message: imidazol97 (Jan 19, 2008 6:56 pm) imidazol97 (Jan 19, 2008 7:16 pm) vance728 (Jan 19, 2008 7:29 pm)
#31 of 57 Re: 1991 buick lesabre tune up [vance728] by imidazol97 Jan 19, 2008 (6:56 pm)
Replying to: vance728 (Jan 19, 2008 6:43 pm) If the plug wires are still Packard which is original Gm wires, it's past due. If they're a different brand I'd go by how old they look.   I'd put in a bottle of Chevron Techron fuel system cleaner (available at Walmart, Meijer, Pepboys, Advance auto, compare prices). Put it in when tank is low and then add 10 gallons or 20 gallons. Drive and see if it makes a difference. I use it twice a year. Don't over use it. And don't get the injector cleaner version in the same black bottle. I don't think it's as strong.   Check the air filter. Replace if it looks like dirt is embedded into the fibers. Or knock dirt off and continue.   See if the trans oil has been drained and replaced. If the one dealer did service, they can tell you if it was done if the papers aren't in the car. Some people would advise against draining oil after 15 years. You might want to ask in the Oil, A Slippery Subject forum. Replies to this message: imidazol97 (Jan 19, 2008 7:16 pm) vance728 (Jan 19, 2008 7:29 pm)
#32 of 57 Re: 1991 buick lesabre tune up [imidazol97] by imidazol97 Jan 19, 2008 (7:16 pm)
Replying to: imidazol97 (Jan 19, 2008 6:56 pm) A note about oil light. Could be sender. Could be worn oil pump and that may have lowered pressure and worn bearings.   and someone noted in another discussion   " These engines were notorious for their weakened oil pressure relief valves. If you have been using conventional oils and not changed oil at proper intervals, you probably have gunked up the seals inside the relief valve or in the oil pressure sensor. Doing a motor flush may help things out and restore the operation of the relief valve. You might try adding Risolone (a high detergent oil) to your crankcase and hope for the best. Other than that, it's a fairly meaty chore to remove the oil pan and oil pump for replacement."
#33 of 57 Re: 1991 buick lesabre tune up [imidazol97] by vance728 Jan 19, 2008 (7:29 pm)
Replying to: imidazol97 (Jan 19, 2008 6:56 pm) thanks a lot for your time and help.
#35 of 57 climate control problem by dewmaster Jan 24, 2008 (4:11 pm)
i have a 1994 lesabre. the climate control works rarely with the individual climate buttons illuminated but it usually doesnt. there is no light illuminated 98% of the time and the air comes out of all the vents. the temperature control always works as well as the blower motor. there is a clicking behind the dash below the passsenger airdag and above the glove box when the control lights flicker. does anyone have any idea what needs to be replaced? Replies to this message: kelli3217 (May 17, 2008 3:43 pm) rlrufus (May 19, 2008 7:32 am)
#36 of 57 Re: Buick LeSabre/power windows [monticellorob] by dewmaster Jan 24, 2008 (4:29 pm)
Replying to: monticellorob (Sep 28, 2007 8:57 am) regarding ur window motors, the motor teeth could be worn down. if u can take the door panel off, you should be able to find the window motor about midway down the door. if the teeth on the outside arent worn, turn the key to the on position and tap on the motor with a small hammer while pushing the power window switch up and down. if nothing happens, its most likely the window motor. have you tried to push the window down? the window could simply be stuck as well. u will be able to tell if the motors internal gears are spinning or not. if not, u can most likely spray some multipurpose lubricant on all the moving parts. u cant go wrong by spraying too much. im not 2 sure about the lights in the steering wheel. u may b able 2 get the switches replaced. unfortunately u sometimes have to do that. good luck!!!
#37 of 57 Re: 1994 check engine codes [imidazol97] by cnfbrock Feb 19, 2008 (8:48 am)
Replying to: imidazol97 (Jan 14, 2008 5:57 am) I also am checking on a 94 Buick Lesabre and check engine light is on. Engine light comes on after about 10 minutes running, surging up and down,and is running rough at idle. Could you please send me the diagram on how to jump. I got a key from Autozone, but can't figure out where to use it. I have wire down for code reader. I don't see any A and B on it. Please help. Replies to this message: imidazol97 (Feb 19, 2008 1:33 pm)

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