Fuel pumps

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Fuel pumps

Postby PeterM » Wed Apr 27, 2011 9:34 pm


Has anybody noticed that some new fuel pumps [check with your pico] do not rotate at 5-6000rpm [as the book says] - more like 3000rpm [multipoint]. You can check the commutator and the waveform but when you check your new pump, the waveform will be a remarkably different but the revs will be lower. Has anyone else come across this?

Thanks a lot,
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Re: Fuel pumps

Postby Autonerdz » Wed Apr 27, 2011 10:08 pm


Not sure what book you have been reading, but there is no general RPM rule. That varies a LOT as does current level from application to application.

As far as new pumps go though, the waveform is often not well ordered until the brushes wear in.
Tom Roberts
(The Picotologist)
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