Fuel pumps

Ask any questions about using PicoScope Automotive software here.

Fuel pumps

Postby PeterM » Wed Apr 27, 2011 7:34 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,
Posts: 9
Joined: Fri Jun 26, 2009 2:51 pm
Location: Saddleworth

Re: Fuel pumps

Postby Autonerdz » Wed Apr 27, 2011 8:08 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)
User avatar
Zen Master
Zen Master
Posts: 268
Joined: Wed Nov 20, 2002 4:19 pm
Location: Washington State USA

Return to PicoScope 6 Automotive software

Who is online

Users browsing this forum: No registered users and 0 guests