Archive for September 2026

The Short Answer: Port injection sprays fuel into the intake port before the intake valve. Direct injection sprays fuel straight into the combustion chamber. Both are forms of fuel injection, but direct injection is built for modern factory engines, while port injection is the better option for most classic cars, hot rods, street trucks, and…

The Short Answer: Vapor lock happens when fuel in the line or pump gets hot enough to boil and turn from liquid fuel into vapor. A mechanical fuel pump can’t push vapor, so the engine starves for fuel and stalls. EFI prevents vapor lock by running fuel at higher pressure through a sealed system, keeping…