Question about 1993 Buick LeSabre
The radion and headlights and all work
Alot of the time, Buicks and other GM's from the 90's have problems with the antitheft system. When this system fails, the starter gets turned off as a theft deterrent. Look around your dash for a light that says SECURITY or ANTITHEFT. If you see this light, then you KNOW that this is the problem.., Here is some info on the security system along with a link to help fix this.
The security light is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM. (Theft Deterrent Module) The TDM is what tells your computer that the correct key is being used and that it is "OK" to allow the vehicle to start and run. These 3 parts must be in CONSTANT communication. If the key is in the ignition, then these parts are sending important signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, (normally due to a failing/broken part) the car goes into antitheft mode. The car misinterperates this and thinks its being stolen or hotwired because it is NOT getting that signal from YOUR specific key. There is where the security light turns on and shuts down your vehicle. So basically, if that light is on, your system has some sort of failing part. This can start as an intermittent "no start", to your vehicle not running for days at a time, to the vehicle NEVER starting again. The problem is electrical and computer based, so don't count on an easy reset button, or the problem fixing itself. The hard part is isolating which part is the problem. You can spend a thousand dollars through a mechanic very easily. I have had great luck with bypassing the entire system. This way the problem will never return. It actually CAN'T ever return because it is eliminated. This can also be done yourself at a much cheaper cost. Read through this link very carefully. You'll find alot of information and pictures, along with ways to help you fix this.
Posted on Feb 13, 2012
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Posted on Jan 02, 2017
If the car was in storage for an extended time, the electrical system may have been disconnected from the battery or the battery may have gone dead. If so, the computer may have lost its original memory and is now re "learning" the operating parameters. Make sure that the ecm fuse is installed and that it is not blown. From your description, it sounds a lot like the computer is presently operating in "limp mode". Don't bother using premium fuel...it does nothing to clean out anything in the engine...all higher octane rating will do is prevent detonation, which you do not have. If it keeps running as it is, you can have a code test done at many of the larger auto parts stores...possibly there is a stored code or two that may help you find the problem.
Posted on Jun 07, 2009
Go down to your nearest auto parts store, they should have what you need. Might be as simple as cutting the line and using a rubber sleeve around it with a couple hose clamps.
Posted on Oct 30, 2009
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