How does the Vortec central sequential fuel injection system work?
How does the Vortec central sequential fuel injection system work?
The Vortec Central Sequential Fuel Injection system utilizes a unique fuel injector for each cylinder. The injector coil is located in the central ‘spider’ with a tube sending the injected fuel to a poppet nozzle in the port of each cylinder. These poppet nozzles require >45psi fuel pressure to open when working properly.
How does returnless fuel injection work on a Chevy Silverado?
On a 2005 Chevy Silverado, for example, the on demand returnless EFI system has a turbine-style fuel pump inside the fuel tank that routes fuel through an in-tank filter to the in-tank regulator. The regulator maintains a preset pressure to the fuel injection system, which is 55 to 62 psi (or 48 to 54 psi on engine VIN code Z).
What should the pressure be for fuel injection?
In ways, these systems function sort of like an old-fashioned diesel injection system except that there is no mechanical fuel pump, fuel injection is controlled electronically, and the operating pressures are much lower. Fuel pressure in the CPI system with the key on and engine off (KOEO) should be about 58 to 62 psi.
What is the fuel pressure in a CSFI system?
Fuel pressure in the CSFI system is a bit higher than the CPI system (60 to 66 psi with key on engine off), and the regulator maintains the operating pressure at 55 to 57 psi. The poppet valves in the spray nozzles also open at a slightly lower pressure (about 40 psi). The injectors fire just before each intake valve opens.
What’s the fuel pressure on a 97 Chevy?
There are two different fuel pressure specs for this vehicle. Central SFI 60-66 psi SFI 56-62 psi If you are not experiencing any drive ability issues, then I would not worry about. IF it is still hard starting, then I would try adding some fuel or starting fluid ot the intake to see if she fires right up when this happens.
The Vortec Central Sequential Fuel Injection system utilizes a unique fuel injector for each cylinder. The injector coil is located in the central ‘spider’ with a tube sending the injected fuel to a poppet nozzle in the port of each cylinder. These poppet nozzles require >45psi fuel pressure to open when working properly.
When did GM start using Vortec fuel injection?
GM 4.3, 5.0 and 5.7 Vortec Injector conversion. Vortec 4.3L 5.0L and 5.7L engines from 1996-2002 have been found to be very sensitive to fuel deposits in the fuel injectors. The Vortec Central Sequential Fuel Injection system utilizes a unique fuel injector for each cylinder.
What kind of fuel injection does a GMC use?
Back in 1992, General Motors introduced a new type of fuel injection system known as “Central Port Injection” (CPI), which GM also refers to as “Central Multi-point Fuel Injection” (CMFI). The system was used on 4.3L V6 Vortec engines through 1995, and was redesigned in 1996 and renamed “Central Sequential Fuel Injection” (CSFI).
