Is the fuel injector in a fuel injected engine maintenance free?
The fuel system of a modern computer-controlled fuel injected engine is so reliable that it seems to be almost maintenance free, but these modern fuel injected engines have fuel injectors that become flow restricted or “dirty” with use.
Which is the best way to clean a fuel injector?
3. An ultrasonic injector cleaner and injector flow bench. The preferred method of cleaning injectors. Cycles the fuel injectors while the fuel injector tips are immersed in an ultrasonic bath, which uses an environmentally friendly cleaning fluid to clean the fuel injectors.
What’s the best way to diagnose a fuel injection system?
The use of a scan tool is the best way to diagnose the fuel injection system. Even if you do not have the latest scan tool, there are many low-cost computer scan tools on the market that are very affordable and easy to use.
How big should an OE fuel injector be?
Ideally, all fuel injectors would be built to the same flow tolerances, but that would increase the size of fuel injectors substantially. Most OE fuel injectors are held to a +/-2% variance, but aftermarket ones can be as much as 25% from the target flow rate.
Where does the fuel go in a fuel injection system?
After pulling fuel from a vented fuel tank, the fuel is delivered through a barrel valve that controls the amount of fuel with the position of the air valve. Fuel goes through the barrel valve, then through fuel lines, directly to the intake system feeding each cylinder. For tuning, simple jetting changes control how much fuel enters each cylinder.
How does electronic fuel injection ( EFI ) work?
To compare, electronic fuel injection (EFI) works with a similar air valve although it may be throttle controlled or controlled electrically. An electric fuel pump provides the fuel at a constant fuel pressure. Electronic controls modulate the duty cycle of electronic fuel injection for the throttle position and other factors.
What do you need to know about mechanical fuel injection?
For Sprint Cars, it is used as a secondary bypass at an elevated pressure for an increased surge of fuel as an accelerator pump out of the turns. The barrel valve on this blown alcohol engine shown with additional fuel pathways for various drag race tuning functions: starting, burnout, staging, launch, and high speed lean-out.
How is air controlled in a fuel injection manifold?
Air is controlled with butterflies in a fuel injection hat or manifold. Usually, a mechanical cable with linkage connects from the driver-controlled throttle, and the butterflies are adjusted with a throttle stop for idle. Mechanical linkage connects the butterflies to the barrel valve.