Before electronic fuel injection showed the way forward, European engineers created radically and wonderfully complicated mechanical fuel-injection systems.

Fuel injection systems are high-precision electro-mechanical systems with tight tolerances that operate under very high pressures.

Before electronic fuel injection showed the way forward, European engineers created radically and wonderfully complicated mechanical fuel-injection systems.

Understanding how oem electronic fuel-injection systems work By Terry McGean When the auto manufacturers first introduced their newfangled multiport fuel-inject ...

Fuel injection systems are high-precision electro-mechanical systems with tight tolerances that operate under very high pressures.

The average guy can't make it work." The typical mechanical-fuel-injection system is an individual-runner-style intake, which is generally difficult to set up properly for part-throttle operation.

That's because almost all fuel injection systems require higher fuel pressures than a carbureted system, and most also require a fuel return line, not often found on a carbureted vehicle.

EFI stands for electronic fuel injection. EFI uses a computer-controlled system to deliver fuel to the engine with greater precision, and fuel injection has replaced the carburetor in modern cars.

These largely mechanical devices have delivered precise amounts of air and fuel into engines from the very first internal combustion engine until electronic fuel injection took over in the late 1980s.

One of the defining features Audi engines is TFSI, featured in a plethora Audi models. Combining turbocharging and direct injection, TFSI is quite the tech.

The global fuel injection system market is on a robust growth trajectory, valued at USD 67.9 billion in 2025 and projected to ...