A fuel injection system precisely delivers fuel into each cylinder under electronic control. Instead of relying on vacuum or mechanical draw (like a carburetor), injectors use electronic signals from the ECU to meter the exact amount of fuel needed for optimal combustion — improving power, efficiency, and throttle response.

EFI systems offer better cold starts, improved throttle response, smoother idling, and more consistent air/fuel ratios across different temperatures and altitudes. They also enhance fuel economy and reduce tuning maintenance — ideal for both street and race setups.

Match your EFI system to your engine’s displacement, horsepower, and intended use. Consider whether you want a throttle-body injection (TBI) system for easier carb-style installation, or a multi-port injection (MPFI) setup for higher precision and performance. Always check compatibility with your intake manifold and fuel system components.

Most TSP EFI systems are return-style, which helps maintain consistent pressure and prevents vapor lock. However, some models can operate in returnless configurations — check your specific system’s documentation to confirm.

Typical EFI systems operate between 40–60 PSI, depending on the injectors and regulator setup. Using a proper high-pressure pump and compatible regulator ensures stable performance and prevents lean conditions under load.

No — carbureted pumps don’t supply the pressure required for EFI operation. You’ll need a dedicated EFI-rated fuel pump and regulator capable of maintaining consistent high-pressure flow.

EFI systems are relatively low maintenance. Periodically inspect fuel filters, injectors, and wiring connections. Keep your fuel clean and avoid running the tank dry to prevent debris from entering the injectors.

Common causes include clogged filters, air in the fuel lines, or weak pumps. Verify that your pump, regulator, and injectors are functioning correctly and that the fuel system is free of leaks or restrictions.

Yes — all TSP EFI systems are backed by a 1-year limited warranty covering manufacturing defects. Please visit our Warranty & Returns page for details on coverage and procedures.