题目内容

Any fuel that is not delivered to the ____manifold by the injector is returned to the tank through a fuel return pipe.

A. closed
B. open
C. exhaust
D. intake

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During cold engines starting ,many engines incorporate a cold start injector designed to improve______below a specified coolant temperature.

A. stability
B. driveability
C. reliability
D. startability

The ECU____ the injector to deliver just enough fuel to achieve an ideal air/fuel ratio of 14.7:1.

A. send
B. site
C. cite
D. signals

The ______ has the job of supplying a combustible mixture of air and fuel to the engine.

A. staring system
B. cooling system
C. lubricating system
D. fuel system

The length of time that the ______ are open determines the amount of fuel that is sprayed into the engine.

A. sensors
B. filters
C. injectors
D. pipes