单项选择题
A.lag behind the increased fuel supplied to the engine
B.enter the engine along with the increase in the fuel
C.enter the engine before the increased fuel supply
D.leave the turbocharger as a negative pulse
单项选择题 After changing out the fuel filters the diesel engine fails to restart, the most probable cause for this condition is a/an（）.
单项选择题 If a diesel engine starts firing, but is unable to come up normal speed, either without load or even under a small load, the cause may be （）
单项选择题 Air in the fuel can cause（）