Glossary / Engine

fuel rail

12 Episode Mentions

Too Afraid to Ask

Think of the fuel rail as a tiny highway that carries gasoline from the tank to each part of the engine that needs it. It keeps the fuel at the right pressure so the car can run smoothly.

Technical Definition

The fuel rail is a component of the vehicle’s fuel injection system that delivers pressurized gasoline to each injector. It acts like a small pipe or tube that holds the fuel before it’s sprayed into the engine cylinders.

Hear It Discussed

"Is that old enough where it still uses a fuel pressure regulator on the fuel rail?"
People Calling Us To Find Out What's Wrong With Their Cars Under The Hood show 15:21

"a high pressure pump that's you know, feeding fuel a really high pressure to the fuel rail..."
Ron Ananian, The Car Doctor - May 16, 2026 - Hour 2 Ron Ananian The Car Doctor 25:52

"There's lots of pumps and [924.4s] that, that packed the gas into a, yeah, gas into a fuel rail and they just weren't running at full noise..."
To the office! Mille Miglia, Minis, a hydrogen record My week in cars: the Autocar podcast 15:19