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techtalk:evo:engctl03 [2020/01/03 11:03] ixl2relax [Low Fuel Sensor] |
techtalk:evo:engctl03 [2020/01/24 21:56] ixl2relax [IAC - Idle Air Control] |
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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. |
| - | + | ||
| - | 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. | ||
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| ==== TPS - Throttle Position Sensor ==== | ==== TPS - Throttle Position Sensor ==== | ||
| - | The Throttle Position Sensor (TPS) is mounted on the Throttle Body of 2007-later (EFI) models.(( | + | The Throttle Position Sensor (TPS) (see pic above) is mounted on the Throttle Body of 2007-later (EFI) models.(( |
| Information for this section was collected from the 2008 Sportster Electrical Diagnostic Manual)) - See example in the 'EFI Manifold & Induction Module' picture. | Information for this section was collected from the 2008 Sportster Electrical Diagnostic Manual)) - See example in the 'EFI Manifold & Induction Module' picture. | ||
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| ==== IAC - Idle Air Control ==== | ==== IAC - Idle Air Control ==== | ||
| - | The EFI Sportsters (2007-later) include an Idle Air Control (IAC) to set the idle speed of the engine. The IAC is mounted on the throttle body. See example in the 'EFI Manifold & Induction Module' picture. | + | The EFI Sportsters (2007-later) include an Idle Air Control (IAC) (see pic above) to set the idle speed of the engine. The IAC is mounted on the throttle body. |
| In normal operation, the opening and closing of the throttle plate in the throttle body (via the throttle cables) determines the amount of air flow into the intake manifold. But in the EFI system, the ECM controls the IAC which opens & closes an air pathway around the throttle plate to supply air into the manifold during engine idling. | In normal operation, the opening and closing of the throttle plate in the throttle body (via the throttle cables) determines the amount of air flow into the intake manifold. But in the EFI system, the ECM controls the IAC which opens & closes an air pathway around the throttle plate to supply air into the manifold during engine idling. | ||
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| **{{:common:space100x5px.jpg|}}.65 gallons remaining for XL1200X & XL1200V (w/ 2.1 gal tank)\\ | **{{:common:space100x5px.jpg|}}.65 gallons remaining for XL1200X & XL1200V (w/ 2.1 gal tank)\\ | ||
| {{:common:space100x5px.jpg|}}.80 gallons remaining for XL883R & XL883N (w/ 3.3 gal tank)\\ | {{:common:space100x5px.jpg|}}.80 gallons remaining for XL883R & XL883N (w/ 3.3 gal tank)\\ | ||
| - | {{:common:space100x5px.jpg|}}1.0 gallons remaining for XL883L & XL1200C/CP/CA/CB (w/ 4.5 gal tank)\\** | + | {{:common:space100x5px.jpg|}}1.0 gallons remaining for XL883L & XL1200C/CP/CA/CB (w/ 4.5 gal tank)** |
| The following illustration is a functional schematic of this sensor/indicator operation. | The following illustration is a functional schematic of this sensor/indicator operation. | ||
