Main Question or Discussion Point
Hi All, The ECU on my motor bike allows you to select different amounts of engine braking in it's various riding modes. I imagine that the ECU just opens up the throttle bodies a little so that at closed throttle the engine still delivers a bit of torque. Doing this will increase the idle speed as a side effect, so how is the idle speed controlled, in this case lowered? My best guess is that ignition timing is used to keep the idle speed down. Any ideas?