What caused the fire in the second cylinder of Buick New Regal 1.6t?

Hello, there are two main reasons. First, check whether your spark plug is turned off normally. If not, let's see if the spark plug is damaged, or the cylinder line is not energized, or the distributor is faulty. The second reason is that our fuel injectors don't inject fuel. First, let's see if the plug of the fuel injector has a fuel injection pulse width, or if the fuel injector is blocked. It's an honor to solve your car problem. Have a nice day! If there is something wrong with your car, ask the car mechanic. 4S shop professional technician, 10 minutes to solve.