How does Harley EFI work?
With an electronic fuel injection system, the required fuel amount for each RPM and engine load condition is located in the fuel map located in the ECU. Once this primary fuel amount is known, then the ECU further adjusts the fuel mixture for the engine and air intake temperatures.
When did Harley Davidson start using fuel injection?
The ’01 model year saw the introduction of EFI to the Softail line, while in ’04 the Dynas had the optional computer-controlled gas mixer. Magneti Marelli (MM) designed Harley-Davidson’s first incarnation of fuel injection.
How does a fuel injection tuner work on a Harley Davidson?
The FI200R allows the tuner to adjust the fuel curve over the engine’s entire rpm range by adding fuel. It does not change rev limit or ignition timing. Newest models are equipped with a cable that connects to O2 sensors on ’06-model Dynas and all ’07 bikes.
Where are the fuel injectors located on a Harley Davidson?
A TB’s main function is to regulate air. Two electronically controlled fuel injectors (one for each cylinder) are mounted into the intake manifold and control the fuel supply. An electronic control module is mounted either under the motorcycle’s seat or under the cover located on one side and just below the seat.
What is the throttle body on a Harley Davidson?
The throttle body, also known as a TB, looks similar to a carburetor and includes a butterfly to regulate airflow, but it has no jets or float bowl to store fuel. A TB’s main function is to regulate air. Two electronically controlled fuel injectors (one for each cylinder) are mounted into the intake manifold and control the fuel supply.
The ’01 model year saw the introduction of EFI to the Softail line, while in ’04 the Dynas had the optional computer-controlled gas mixer. Magneti Marelli (MM) designed Harley-Davidson’s first incarnation of fuel injection.
The FI200R allows the tuner to adjust the fuel curve over the engine’s entire rpm range by adding fuel. It does not change rev limit or ignition timing. Newest models are equipped with a cable that connects to O2 sensors on ’06-model Dynas and all ’07 bikes.
When did Harley Davidson start shipping Sportys with EFI?
Starting in 2007, all Harley models are shipped with EFI, including Sportys for the first time. The impetus for migration to EFI is to meet the more demanding federal emissions standards intended to take effect in California in 2006 and in 2008 for the other 49 states.
Are there any problems with the zipper mm EFI?
Unfortunately, the early MM EFI had some shortcomings that affected performance, not just on stock bikes but particularly on modified motors. Some of the problems reported with the MM EFI were hard starting, erratic idle, and difficulty in tuning.