Follow the plug wires down to the plugs. The front three are easy I recommend trying to start on the three in the back first and working downhill! Good luck can be tricky.
Check firing order
the spark plugs are located on the front of the engine under the hood
Disconnect the battery, remove the boot cover and spark plug cables, and pull out the old spark plugs. Put in the new spark plugs, replace the boot cover, and spark plug cables, and reconnect the battery.
Faulty plug wires or bad coil or coil wire.
On a 1996 Buick Roadmaster, the spark plugs are located on the engine's cylinder heads. This vehicle typically has a V8 engine, so you will find the spark plugs on either side of the engine, beneath the ignition coils and covered by the engine's intake manifold. To access them, you'll need to remove the ignition coil packs and possibly the intake manifold, depending on the specific engine configuration.
Remove the spark plugs wire and remove the plugs wit a spaerk plug wrench or socket.
It passably the Alternator, or the spark plugs. No way to really tell, but that's the common reasons why.
One at a time
Check spark plugs and wires
how to replace spark plugs wires 1992 buick century v 6 3300 stationwagon
two spark plugs are located to the right side of the engine and the other two spark plugs are located on the left side of the engine.
This vehicle uses Coil ON Plug ignition coils. So you have to remove the coil and the rubber boot to get to the spark plug