Question about 1993 Buick Century

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93 Buick Century no spark

The ignition module on 93 Buick Century has no power going to it when you turn the key could it be a broken wire or the computer itself...the car is getting no spark and the coil packs were tested

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  • nova350grl Jan 18, 2009

    the crank sensor was replaced and tested and also the hot wire (color pink) from the igniton to the ignition module was tested and carries a 12.20 volts but the car still has no spark...coils and module were tested thank you

  • yadayada
    yadayada May 11, 2010

    the computer does not supply power to the ignition module.

  • Anonymous Mar 19, 2014

    how do i test the coils?



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Although the computer does not suply power it does controle it and when it sparks so yes check the ecm for quad driver failer it will read a code for it just check the trouble codes if this is the problem and I do beleve it is considering i just fixed mine due to the same thing you will either need a shop to install a new or remanufactered computer in the car or if your up to it go get one from a autoparts dealer priced at about 130+ a mechanic could do this job in 45 min, if you find a good one with low prices maybe 

Posted on May 15, 2009

  • pamdennis22
    pamdennis22 Jan 25, 2014

    how can i bypass the ignition so i can use reg key


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I had the same problem. the ignition modules position in the car is poorly placed which causes it to overheat over time. ignition module eventually wears out. i replaced the ignition module and now it starts every time :)

Posted on Apr 01, 2009

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Check the crankshaft sensor or cam sensor

Posted on Jan 15, 2009

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Is there anyway to bypass the security on a buick century 3.1 2000

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). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other.
The security light illuminates when that signal gets broken, or not seen at all. When the communication breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. (like it thinks it's being hot wired) The car shuts down because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. It will either turn off the starter, or the fuel injectors. The vehicle may run for 2-3 seconds before shutting down. This link explains it pretty well.


Do It Yourself GM Security bypass

Sep 09, 2016 | 2000 Buick Century

1 Answer

2003 Buick century lost key trying to figure out how to hotwire

With out a key how are you going to unlock steering ?
The steering column lock !
Beside that you would have to get around anti-theft system ! An the fact that all functions on your vehicle are controlled by computers ! The ignition is an input to the BCM - body control module !
Serial Data Power Mode
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle the PMM is the Body Control Module (BCM). The BCM receives 4 signals/circuits from the ignition switch. These are the Ignition 0, Ignition 1, Crank and Accessory 1 ignition switch signals/circuits.
To determine the correct power mode the BCM uses:
• The state of these signals/circuits, either switch closed (B+ = 1) or switch open (open = 0)
• The sequence of switch closures received by the BCM
• The status of the engine run flag.
I'd say you don't have a snow balls chance in guam of hot wiring this vehicle ! There made so that can't be do ! So have it towed to a GM dealer or some other qualified repair shop ! Because if you start jumping wires you'll burnt of computers etc....

Aug 21, 2016 | Buick Cars & Trucks

2 Answers

How much should it cost to change the spark plugs, wires and air filter on 2000 Buick Century?

Quality wires, iridium plugs and air filter , close to $100 for parts. You doing it yourself will save a lot on labor . 3800 V6 ?

Jan 29, 2016 | 2000 Buick Century

2 Answers

What will cause my 1996 buick century to misfire.

The list is long. Bad spark plug/s, wire/s, distributor cap, camshaft, valve/s, piston/s, gasket/s, vacuum leak, fuel injector/s among other things. Some diagnosis will be needed.

Jul 03, 2014 | 1998 Buick Century

1 Answer

97 century turns over but won't start

If it is 3.1 engine, I would guess it to be Ignition (Spark) Control Module located under the coil packs.(coil packs bolt/screw directly onto the Module itself)
Best of luck !

Feb 16, 2014 | 1997 Buick Century

1 Answer

Ok we changed the ignition module in our 1987 buick century, 2.5 liter and now when you start the car it just dies continuiously but once we get it started it will go but acts like it wants to die at stop...

Did you replace the crank sensor that is bolted to the back of the module? Is it possible that you got two of the plug wires switched. Or maybe 1 of the two coils is bad.

Apr 23, 2010 | 1987 Buick Century

2 Answers

1994 buick century blowing ignition modual

I doubt it I think you are close I'd check ground wires at module and at frt left side of eng to trans bolts also ck connectors for module see if green if go to radio shack get elect cleane to use

Aug 30, 2009 | 1994 Buick Century

1 Answer

Thanks for the help on my 93 buick le sabre ive replaced the crank sensor but it still wont start. cranks over ok. no spark. the ignition module has been replaced

thats weird mmmm make sure than you have power going to the black and pink wire or pink with black stripe wire when you turn the ignition on, i don't know what else to recomend you since im not close to the car but the only coming problems on these cars is the module or the crank sensor, did the module installed on it was new? or used? if not sure or even if is new call to auto zone
and ask them if they test ignition modules for free i belive they do and if tehy do take the module out and take it to them, for testing, also by the time you remove the igniton coils turn the ignition on, and make sure you are geting power to one of the coil conectors, and the only way to get to the conectors is by removing the coils, and if there is not power then your ignition switch or a lecttrical problem is present, also make sure to do a cotinuity test to the wires coming from crank sensor to ignition module, check them for open or short to ground

Jul 20, 2008 | 1993 Buick LeSabre

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