Blue smoke is coming from the exhaust pipe of a vehicle.Technician A says that worn piston rings could be the cause.Technician B says that a bad head gasket could be the cause.Who is right?
Technician A only
Technician B only
Both A or B
Neither A or B
A poor running vehicle has low fuel volume. Technician A tests the electrical connector at the tank, and finding system voltage available, says the vehicle needs a new pump.Technician B says high circuit resistance may prevent the pump from operating properly. Who is right?