[DML] Re: She starts (painfully), she runs (mostly), she doesn't go anywhere...

["Elvis" <elvisnocita@xxxxxx>]

Gentlemen,

there is nothing inside the pumpt that controls the output power of it !
This is a stupid brushed motor that spins depending of the counterpressur that it sees.

The unused pressure is transformed into fluid flow by the pressure regulator.

And - a higher resistance (bad connector, thin wire, oxydized fuse, melted fuse holder) reduces the current.


NO need to believe me, I just make my money with fans - which is nothing else but an air-pump.
BTW - powerfull fans do have electronics inside to limit the max speed by PWM - therefore they can keep the power constant. When the voltage goes down - in certain limits - it draws more current.
Again - nothing like this in a fuel pump. 
Yes, I even cut an old pump open to see how it works.

Oh another example - the interior fan - it uses resistors to reduce the power, position 1 and 2 don't even require an extra relay...strang if - according to you - the current goes up ?!?!?!? :-P

Have fun ;-)
Elvis & 6548



--- In dmcnews@xxxxxxxxxxxxxxx, Ian <texas.twister@...> wrote:
>
> Ditto!
> 
> Ian Yanagisawa
> 
> On Jun 18, 2013, at 12:53 PM, JP Hindin <jplist2008@...> wrote:
> 
> > 
> > 
> > On Tue, 18 Jun 2013, Elvis wrote:
> > > This is a very strange theory, that a lower voltages kill something and draws more current.
> > 
> > This one I /can/ answer - the work of the pump doesn't change, so it's
> > fixed - the laws of physics state that by lowering the voltage, the
> > amperage must go up (Volts x Amps = Watts). This damages the pump because
> > it's not designed to run at higher amperages, which would require it to be
> > more sturdy with heavier duty wiring and stators, thus it burns out.
> > 
> > > Anyhow - is the piston in the fuel distributor stuck ?
> > >
> > > Push the air metering plate down and you 'll see.
> > 
> > I'll check this also, thank you.
> > 
> > I've never actually dug into the engine bay - I only redid the tank - so
> > I'm a little gunshy of tearing off covers and digging into it. I guess I'd
> > best get over it and get cracking.
> > 
> > - JP
> > 
> > > --- In dmcnews@xxxxxxxxxxxxxxx, Ian <texas.twister@> wrote:
> > > >
> > > >...
> > > > The low voltage ends up requiring more amperage to run the pump. This will eventually burn out the pump. There have been several threads on this issue. ...
> > >
> > > >
> > >
> > >
> > >
> > > ------------------------------------
> > >
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> > >
> > >
> > 
> > 
> 
> 
> [Non-text portions of this message have been removed]
>




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