What is sequential port injection on a Harley-Davidson?
The Harley-Davidson ESPFI system is known as a Speed/Density, Open Loop, Sequential Port Fuel Injection system, that controls both fuel flow, and spark timing. Sequential Port Fuel Injection – Injector nozzles are positioned in the manifold near the intake valve and are precisely timed to deliver fuel to each cylinder.
How can I tell if my Harley is fuel injected?
That being said, the easiest way to know if it’s fuel injected is to turn the main switch on, then toggle the engine kill switch. If you hear a whine that sounds like it’s coming from inside the right side of the tank, it’s a FI bike. If you hear nothing, it’s carbed.
Is sequential fuel injection direct injection?
Basically, a SFI (sequential fuel injection) system has a fuel injector for each cylinder. DI (Direct Injection) is the next evolution of fuel injection where the fuel is injected after the intake valve directly into each cylinder at over 3000 psi.
Where is the sequential port fuel injector located?
Sequential Port Fuel Injection – Injector nozzles are positioned in the manifold near the intake valve and are precisely timed to deliver fuel to each cylinder. Still with me? OK, let’s dig into the components that make up the system, what they do, where they are, and what they are commonly called.
What’s the difference between multiport and sequential fuel injection?
Multiport and sequential fuel injection systems both inject atomized fuel into a port just before the intake valve. There is a difference in the way these systems operate. Multiport injection systems fire the injectors in groups.
Where does fuel injection go in a Harley Davidson?
Sequential Port Fuel Injection – Injector nozzles are positioned in the manifold near the intake valve and are precisely timed to deliver fuel to each cylinder. Still with me? OK, let’s dig into the components that make up the system, what they do, where they are, and what they are commonly called.
Can a sequential fuel injection system cause a misfire?
The fuel charge in some cylinders momentarily sits, but engines rotate so quickly the delay is negligible. Due to its design, a problem with one driver will cause a misfire in more than one cylinder. Sequential fuel injection systems fire each injector individually.