If you turn the ignition in the dream, then such dream suggests to take the step in some important matter of your waking life. The dream shows that you are ready to make some major changes.
Dream dictionary: ignition dream meanings
If you dream of syringe, then such dream indicates the need of joy, happiness, passion and ignition. The liquid in the syringe would tell much more about the meaning of the dream. According to other explanations that are related to sexuality, it foretells that the syringe associates with the needle which reminds of sexual intercourse between two individuals.