FIRSTINFO Pneumatic Vacuum System Fuel Injector or Injection Cleaner and Tester Kit Clean fuel injector, intake valve, combustion chamber, vacuum system, parts and valves. Test engine system pressure, fuel pump pressure, the sealing condition of returned line diaphragm. Pneumatic vacuum system. Used for gasoline engine injection. By cleaning up carbon deposited from the intake system and the combustion chamber, this product can restore lost power and let you discover the power of your engine again while you drive. Universal for most models.