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Old January 11th, 2003, 10:30 AM   #1
Ethan Dahlkamp
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When does the fuel pump start?

Does the fuel pump start when the key is turned to the on position, or does it not start until the key is turned to the start position and then remain on when the key is returned to the running position.

Thanks
E
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Old January 11th, 2003, 12:36 PM   #2
Tom M (Sunol, CA)
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Re: When does the fuel pump start?

Not sure about the Boxster but most electric fuel pumps start as soon as the key is switched from the 'off' position. This is especially true with fuel injection as the pressure is required for the injectors to work properly.

Perhaps Jeff or Loren can respond with a specific answer.
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Old January 11th, 2003, 06:56 PM   #3
Loren
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Re: When does the fuel pump start?

The pump starts when you turn the key and responds by building the pressure to the recommended level. Once there, it pulses as need to maintain fule pressure.
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