Replaced spark plugs and wires
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 !
SOURCE: buick century turns over won't start
check whether your vehicle is equipped with any immobilizer -anti theft system- as these systems are the one which could cause these unexpected situations.
SOURCE: car won't stay on
check your alternator it sounds like you arent getting enough juice to the ignition
SOURCE: 1992 Buick Century won't start sometimes but has spark in the plugs.
Faulty cam sensor maybe - it controls the injectors. To diagnose, when you get a non-start, spray a V.small squirt of easy-start(ether) and if it runs a little then you have a fuel issue. The spark timing is controlled by the crankshaft sensor so that can be faulty and cause a mistimed spark but usually you'll get a mis-fire in those cases.
SOURCE: 2002 buick century spark plugs
Yes Is Looks Harder than It Is Just Remove the Pretty Cover from it and Theres An Ordanary Engine Under there Normal Procedure. Dont Forget To GAP The Plugs Correctly Enjoy!! Please DONT Forget To Rate me too Thank You !
SOURCE: How to remove/replace spark plug wire routing clip
Typically, spark wires are encased in a flexible plastic tube which is secured in usually 2 places with special clips. The tubing material gets brittle over time and cracks /breaks easily so patience and being careful are the key. After you remove the tube from its mounting points, you will notice that the tube has a split over its entire length. Carefully spread the split open at on end then pull (one wire at a time through the split. then reverse the process with the new wires..... unfortunately this is even more difficult and requires even more patience... good luck....
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