When compared to mechanical fuel pumps ,electric fuel pumps generally provide ?
a. greater fuel flow and greater pressure
b.greater fuel flow but less pressure
c.greater pressure but less fuel flow
d.less fuel flow and less pressure
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a. more pressure (and possibly, more fuel if needed.)
The fuel pump provides injector rail pressure to overcome the injector nozzle resistance. Note also that some systems will vary rail pressure as well as injector timing to set the overall mixture.