Drivers are just realizing how one small adjustment under your hood instantly increases fuel efficiency

A CAR expert has unveiled how to instantly increase your vehicle's gas efficiency when you notice a drop in its miles-per-gallon rate.

The auto enthusiast shared his advice in a TikTok on his account, which boasts over 140,000 followers.

Tcheon's (@learncar) video clip begins with him saying that a fan claimed his vehicle had high gas consumption.

The gearhead went inside the car that was reportedly dealing with fuel efficiency issues and highlighted how there wasn't a dashboard warning light despite this significant problem.

Next, Tcheon plugs a diagnostics tool into the car's OBD 2 slot.

The tool reveals that the car's throttle valve position was at five percent, clarifying it should typically be two to three percent.

He added that the value becomes larger the dirtier the part gets.

A throttle valve varies an engine's air intake.

But you don't need a diagnostics tool to trace this issue, as drivers can visually inspect this component for grime.

Tcheon walks to the front of the vehicle to look under its hood and points to the box that the valve is under.

The car expert removes the box to reveal the dirty throttle valve.

Tcheon cleans the valve by wiping its surface before placing a brick on the vehicle's gas pedal.

This brick placement keeps the valve open so Tcheon can spray throttle cleaner on a rag that he says is available for cheap.

Lastly, Tcheon wipes the valves inside before removing the brick and putting the box back above the component.

One viewer jokingly commented on this auto enthusiast's TikTok: "Brother Tcheon, does it have to be a red brick?"