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techtalk:evo:engctl03 [2020/01/03 11:05] ixl2relax [Low Fuel Sensor] |
techtalk:evo:engctl03 [2020/01/24 21:54] ixl2relax [TMAP - Temperature/Manifold Absolute Pressure] |
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| ==== Fuel Injectors ==== | ==== Fuel Injectors ==== | ||
| - | The fuel injectors are electrical solenoids (switch valves for liquid) that allow the flow of pressurized fuel from the electric fuel pump. The injectors spray fuel (like a hose nozzle) into the intake manifold air tract. See example in the 'EFI Manifold & Induction Module' picture. | + | The fuel injectors (see pic above) are electrical solenoids (switch valves for liquid) that allow the flow of pressurized fuel from the electric fuel pump. The injectors spray fuel (like a hose nozzle) into the intake manifold air tract. |
| The injection time (therefore, fuel amount) is a matter of how long (in milliseconds) the injector solenoid is active. This is a very small time period. | The injection time (therefore, fuel amount) is a matter of how long (in milliseconds) the injector solenoid is active. This is a very small time period. | ||
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| ==== TMAP - Temperature/Manifold Absolute Pressure ==== | ==== TMAP - Temperature/Manifold Absolute Pressure ==== | ||
| - | (Used on 2007-later models)((Information for this section was collected from Fe Head's contribution to an [[http://xlforum.net/forums/showthread.php?t=278587|XLForum Thread]] and from the 2008 Sportster Electrical Diagnostic Manual)) - See example in the 'EFI Manifold & Induction Module' picture. | + | The TMAP sensor (used on 2007-later models - see pic above)((Information for this section was collected from Fe Head's contribution to an [[http://xlforum.net/forums/showthread.php?t=278587|XLForum Thread]] and from the 2008 Sportster Electrical Diagnostic Manual)) combines an IAT (Intake Air Temperature) and a MAP (Manifold Absolute Pressure) sensor into a single component. It is mounted on the intake air manifold which distributes incoming air from the throttle body into the two cylinders. |
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| - | The TMAP sensor combines an IAT (Intake Air Temperature) and a MAP (Manifold Absolute Pressure) sensor into a single component. It is mounted on the intake air manifold which distributes incoming air from the throttle body into the two cylinders. | + | |
| The TMAP sensor provides information to the ECM upon which the ECM alters the timing of the spark and the injection of fuel based on the current vacuum conditions in the manifold. By altering the spark timing and fuel, better combustion occurs in varied situations. | The TMAP sensor provides information to the ECM upon which the ECM alters the timing of the spark and the injection of fuel based on the current vacuum conditions in the manifold. By altering the spark timing and fuel, better combustion occurs in varied situations. | ||
