Multi-point fuel injection, or MPFI, is a gasoline delivery system that uses four individual fuel injectors to evenly disperse gas into an engine´s combustion chambers. MPFI was developed to succeed the older single-point fuel injection systems.Know More
Single-point injection systems relied on an intake or carburetor to mix an approximate amount of fuel required to run the engine. This approach lead to many problems, such as having the engine run too rich or too lean. The MPFI system was produced to change that approach and increase the engines performance.
Multi-point fuel injection
MPFI, also called port injection, uses intake runners, which are essentially small tubes that connect from the intake manifold to the combustion chambers. Each fuel injector connects to an individual runner and injects gas into the engine, which allows for accurate fuel distribution. This type of fuel injection is found on most vehicles in use today.
Many late model vehicles are now replacing port injection with an upgraded system known as direct-point injection. Direct-point uses a similar method of injecting fuel into each individual cylinder with the only difference being its close proximity to the engine. Direct-port injection systems place the fuel injectors inside the combustion chambers. This improves the timing and fuel consumption of the vehicle.Learn more about Car Parts & Maintenance
A secondary air injection system malfunction occurs when outside water collects inside of the air pump of a vehicle's exhaust system, disabling the pump's ability to pass outside air through the exhaust system. This outside water may then freeze, causing the air pump to freeze and malfunction, explains OBD-Codes.com.Full Answer >
Distillate fuel is a petroleum fraction typically obtained through a conventional distillation process. It includes diesel fuels, which are normally used by diesel engines in cars and trucks, and fuel oils, which are used for space heating and to generate electric power.Full Answer >
Flex-fuel technology refers to a type of vehicle that has an internal combustion engine that can run on either gasoline or up to E85 gasoline-ethanol blend. A sensor in the fuel system measures the ethanol content in the fuel, allowing the engine's control unit to adjust the engine's tune accordingly.Full Answer >
The lifespan of a fuel pump is typically 10 years, although the wear and tear on the vehicle over time can increase or decrease the lifespan of the vehicle part as well as the effectiveness of the fuel pump. Many fuel pumps come with a standard one-year warranty guarantee and customers often have the option to expand the warranty for a fee.Full Answer >