This document discusses the signs of bad fuel injectors in a Volvo V70. It explains that fuel injectors spray fuel into the engine to ensure it receives the proper amount. Bad injectors can cause issues like a check engine light, rough idling, loss of acceleration and poor gas mileage as the engine is not getting enough fuel. The document outlines several signs that indicate faulty fuel injectors, including engine misfires or vibrations from an imbalanced air-fuel ratio. It stresses the importance of addressing bad fuel injectors promptly to prevent engine damage.