题目内容
During cold engines starting ,many engines incorporate a cold start injector designed to improve______below a specified coolant temperature.
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The ECU____ the injector to deliver just enough fuel to achieve an ideal air/fuel ratio of 14.7:1.
The ______ has the job of supplying a combustible mixture of air and fuel to the engine.
The length of time that the ______ are open determines the amount of fuel that is sprayed into the engine.
An EFI system can be consider as having ______ subsytems.
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