for example the ecu 97 can at least partially disable the operation of the fuel injection and or ignition systems preferably the ecu 97 disables the fuel injection and or ignition systems so as to limit the speed of the engine to approximately 2000 3000 rpm the program returns to the start of the control routine and continues the program as long as the engine is running if at the decision block p 14 the engine speed is determined to be less than a predetermined engine speed u201c a u201d the routine 140 moves to operation block p 18 normal ignition and fuel system operation is allowed for example the ecu 97 can control the ignition and fuel systems according to any known strategy for normal operation the routine 140 then ends optionally the routine 140 can return to the beginning and repeat after the control block p 18 additionally the routine 140 can be configured to operate only when the temperature of the engine 12 is below a normal operating temperature for example the ecu 97 can be configured to sample an engine temperature sensor and run the routine 140 only when the engine temperature is below a normal operating temperature preferably the normal operating temperature is the minimum temperature at which the engine 12 should be allowed to operate over its entire rpm range thus from the forgoing description it should be readily apparent that.