Fuel Injection System

A fuel injection system is an engine fuel delivery system that introduces fuel directly into the cylinders or intake manifold instead of using a carburettor. While these systems are less susceptible to fuel evaporation ice and throttle ice, they can be more prone to vapour lock — where fuel in lines running over the hot engine vaporises after shutdown — and can make hot starts more difficult.

Key Points

• •Fuel injection systems are less susceptible to fuel evaporation ice and throttle ice than carburettors.
• •They can suffer from harder hot starts compared to carburetted engines.
• •They cannot become flooded in the same manner as a carburettor, but require specific priming procedures.
• •A mixture control is still required, just as with carburetted engines.

Related Terms