How is fuel pressure controlled in a returnless system?
The fuel pressure is controlled by the amount of voltage being sent to the pump and other electronics. In a returnless system, the fuel pump is not operating at 100% of its duty cycle.
When did they start using fuel injection in cars?
Mechanical fuel injection was used in the 1960s and 1970s by many manufacturers on their higher-performance sports cars and sports saloons. One type fitted to many British cars, including the Triumph TR6 PI and 2500 PI, was the Lucas PI system, which is a timed system.
Is the fuel injection system mechanical or EFI?
Mechanical systems have now been largely superseded by electronic fuel injection (known as EFi for short). This is thanks to the increasing reliability and decreasing costs of electronic control systems.
Where does the fuel go in a PowerStroke?
However, the job of getting adequate fuel to the rails and ultimately the injectors, was left up to a mechanical lift pump in the engine valley that ran off the camshaft.
The fuel pressure is controlled by the amount of voltage being sent to the pump and other electronics. In a returnless system, the fuel pump is not operating at 100% of its duty cycle.
Are there any misconceptions about fuel injection?
Many mechanics and most riders really don’t have a good idea on how EFI works and how the primary components interact. Misconceptions about EFI abound and the amount of bad information being passed around is high. By the time you have finished this article, you should be thoroughly confused or have a new understanding and appreciation for EFI.
How can you tell if your fuel pressure sensor is bad?
If you see the engine warning light illuminate on your dashboard, then it could be a sign that your fuel pressure sensor is bad. Sometimes the engine control unit will sense a problem with the signal from the fuel rail sensor. Then it will activate the check engine light to let you know there is some kind of problem that is related to the engine.
What kind of fuel delivery system does a 454 engine use?
This is an aspirated fuel delivery system with the addition of a mixture control system controlled by the ECM. It is not even close to the ECM used today. This fuel delivery system uses a mechanical fuel pump with the addition of an inline lift pump between this pump and gas tank on some systems to help prevent vapor-lock.