Home | Automotive | Motorcycles
With all the talk of Stage I, Stage II, mapping, Lloydz Victory Fuel Control, PMRT, Eaglecat air boxes, exhausts, ecm, tps. I thought it would be a good idea to just cover the basics of what the Fuel Injection System does on your motorcycle. The fuel injection system is controlled by the ECM. I know, another acronym. The ECM is the Electronic Control Module. This ECM is a programmable device. What does this mean? a program is flashed onto the control module my the Victory service technician. This program tells the ECM the correct ignition timing based on the position of the throttle and the engine's RPM. The program will also tell the ECM the correct fuel to provide. Quick definition: To measure the throttle position, there is this device called the Throttle Position Sensor TPS. This is located at one end of the throttle plate shaft which facilitates the monitoring of the throttle position. This sensing device will modulate its voltage output based on its position. So how does this TPS sensor work with the Electronic Control Module ECM? The output voltage that the Throttle Position Sensor produces is monitored by the ECM. Why? so that the ECM can determine the amount of air that the engine is ingesting. The TPS does not require periodic maintenance. However, if the TPS is set incorrectly there are two main symptoms that will occur. 1. Rich running condition (too much fuel) - fouled spark plugs - poor quality running condition - sooty exhaust 2. Lean condition (not enough fuel. engine runs hot) - backfires - rough running. jerky. - hard to start - engine misses - noisy tranny How could the TPS be set incorrectly? Say you go to your shop and decide to upgrade your Victory from stock exhaust and filter to the yummy stage I. Ok, you have the service shop install the Stage I slip-ons or the Stage I Vance & Hines, install the high-flow K&N air filter. You get your bike back and ride off into the sunset. The key thing that was missed in the above scenario was that the new programmable map for the Stage I configuration was not flashed onto your ECM. Now your bike will most likely encounter one of the two conditions mentioned above. The basic concept of calibrating the TPS is that, "the airflow is calibrated to match the fuel and ignition timing instructions from the ECM under controlled conditions." Performing the calibration at idle ensures that the calibration will be correct at all engine operating conditions.
Article Source: http://www.content.onlypunjab.com
Contributing author to Cycle Solutions.www.cyclesolutions.netand The Victory Kingpin Cruisers site.www.kingpincruisers.net
Please Rate this Article
5 out of 54 out of 53 out of 52 out of 51 out of 5
# of Ratings = 1 | Rating = 5/5
