How does the intake manifold affect your engine?

Author's Note

As a writer for the automotive section of, I write a lot about new technologies that will one day replace the internal combustion engine. Some of these new technologies, like the electric motor, are already in the early stages of direct replacement. But for the time being, the internal combustion engine still dominates the automotive world and it's a good idea to know what can go wrong with it and how to recognize it when something does. Until I wrote this piece I hadn't given much thought to problems with the intake manifold or the possibility that it might be sucking in air that could reduce the efficiency of my engine. With any luck, I'll never hear the telltale signs of my engine hissing while idling, but if I do, I'll know it's time for a checkup (and probably time to write a check to my auto mechanic, too).

Related Articles


  • "Intake Manifolds: Leak Problems and Manifold Gasket Leak Tips." (April 26, 2012)
  • Jathar, Rutaja. "Intake Manifold Leak Symptoms." (April 26, 2012)
  • Rob and Dave's Aircooled Volkswagen Pages. "Air Inleakage." (April 26, 2012)