单项选择题
A.engine power losses
B.smoking due to unburned fuel
C.high exhaust temperature readings
D.all of the above
单项选择题 The major cause of problems occurring with fuel injection equipment is（）
单项选择题 By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engineThe device most commonly used is a（）.
单项选择题 Heat damage to fuel injection nozzles on small high-speed diesel engines, can be prevented by（）