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 >
The Robert Bosch Verteiler diesel injection pump has a metering plunger and a distributor mechanism that sends fuel to the correct cylinder. The pump varies the injection timing in response to the engine's revolutions, and a cold start mechanism advances the idle timing manually.Full Answer >
Drivers searching for a gas station providing E85 fuel can find these stations using a variety of websites, including EthanolRetailer.com or the Department of Energy's Alternative Fuels Data Center. These websites provide mapping tools that locate gas stations selling E85 within a specified radius of a location.Full Answer >
Flex fuel E85 refers to a type of automotive fuel containing 85 percent ethanol and 15 percent regular gasoline. Ethanol 85 functions much the same way as regular gasoline, powering cars and trucks classified as flexible fuel vehicles, or FFVs. However, it forms from different substances than pure gasoline, making it suitable for use only in cars listed as flexible fuel, which have special engines and fuel systems built to handle it.Full Answer >