I would pull the plugs make sure no carbon build up to cause bad spark.

Clean with parts cleaner and a wire brush if needed,let air dry

You can also flush the engine out by turning key over from gas/fumes

You dont need to pull any wires.Holding the gas pedal to the floor when starting will do it or pull the egi fuse in the main fuse box in the engine bay.
Turn the key over for a few seconds then put the fuse back in.

Very easy..
If you know how to check the swooshes.

Pull 1 top plug at a time and listen to the swooshes..while cranking the key over.

All of this has to be done on a fully charged battery.