S Steven New member Jan 10, 2011 #1 What is the firing order of the spark plugs on a 1998 Buick Century 3.8 L engine? Just has a tune=up and the engine is running rough, and stalling. Plus the mileage is worse than before.
What is the firing order of the spark plugs on a 1998 Buick Century 3.8 L engine? Just has a tune=up and the engine is running rough, and stalling. Plus the mileage is worse than before.
