4 Most Common Types of Fuel Injector Failure As a truck owner, you should understand the different components of your engine and how they work to ensure optimal performance and longevity. One important component is the fuel injector. Fuel injectors are responsible for delivering fuel to the engine in precise amounts and at specific intervals. While fuel injectors are both durable and long-lasting, there are still many common types of fuel injector failure you should know about. When you can s...