PULLEY-FAN 4833937 - Caterpillar

mode helps reduce the possibility of engine damage and helps to minimize white smoke. An engine running in cold mode may also sound different and appear to run rougher. During cold mode operation, fuel injection is driven into a multi-shot strategy. Cold mode engine operation is evident by a reduction in rail pressure and an adjustment in injection timing.For cold mode to be activated, engine coolant temperature must be below 69° C (156° F). Also, the engine load factor must be below 30 percent for standby gensets, or 40 to 45 percent load factor for prime or continuous ratings. Cold mode remains active until the engine coolant temperature warms to 71.° C (160° F), or the stated load factor increases above the threshold.