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full thottle switch
Umm, no...
A voltmeter measures voltage, which is like pressure in a pipe. In order
to do this it just "attaches to a fitting" on the circuit.
A ammeter measures current, which is like flow through a pipe. In order to
do so it has to lie in line with the pipe (like a valve).
And, just like a valve or a "flow meter", it behaves to the rest of the
circuit as a normal piece of pipe, but with measuring capabilities.
A short circuit (but with measuring capabilities, heh!).
If you need a better explanation please say so.
But trust me, I've seen more than enough people blow the fuse in their
multimeter by hooking it up to a circuit as if it were a voltmeter.
-Toby
On Fri, 19 Sep 2003, L F wrote:
> Nope.
> Substitute 'voltmeter' for ammeter....
>
> Larry
> ----- Original Message -----
> From: T. Reed
> To: ATS - Patrick Bureau
> Cc: scirocco-l@scirocco.org
> Sent: Friday, September 19, 2003 12:11 PM
> Subject: RE: full thottle switch
>
>
> Uh... that's not good!
>
> You ought to try to remember that whenever you connect an ammeter to
> something you are shorting it out!
>
> -Toby
>
> On Thu, 18 Sep 2003, ATS - Patrick Bureau wrote:
>
> > my setup is CIS with knock box 2L 8v.
> >
> > I tried to get mA from the testing plug (near brake booster) but I can
> > onlyget mVolts from it.
> >
> >
> > ATS - Patrick Bureau - txrocco@sbcglobal.net
> > ----------------------------------------------
> > MSN:ATSGTX@hotmail.com |YAHOO:ATSGTX@yahoo.com
> > ICQ:32918816 |AIM:Texasscirocco
> > ----------------------------------------------
> >
> >
> > =>-----Original Message-----
> > =>From: scirocco-l-bounces@scirocco.org
> > =>[mailto:scirocco-l-bounces@scirocco.org]On Behalf Of Dan Bubb
> > =>Sent: Thursday, September 18, 2003 11:08 AM
> > =>To: Rhett Farnum; t.piwonka@ttu.edu; scirocco-l@scirocco.org
> > =>Subject: Re: full thottle switch
> > =>
> > =>
> > =>Got me!
> > =>They may have a ground or power wire in common, but that's all.
> > =>Maybe somebody rewired your car?
> > =>Using the cold start injector to provide additional fuel has been
> > =>hashed out
> > =>endlessly by everybody thinking they need more fuel, but it's a crummy
> > =>solution because 1) the distribution between cylinders sucks 2)
> > =>there is no
> > =>control over the quantity of fuel injected, it's either off or on.
> > =>Doesn't keep people from trying it.
> > =>If your WOT switch does activate your cold start injector you might think
> > =>about rewiring back to the original schematic cause it would certainly be
> > =>injecting more fuel than your engine needs.
> > =>Dan
> > =>
> > =>
> > =>> If it doesn't use the cold start injector why is my switch
> > =>wired to it???
> > =>>
> > =>>
> > =>>
> > =>> Peace Out,
> > =>> Rhett
> > =>> Rocco_crossing
> > =>> '83 Rocco (autocross ready, tune up, install harness, and finally I may
> > =>get
> > =>> to makeing it look better!!)
> > =>>
> > =>>
> > =>>
> > =>>
> > =>>
> > =>> >From: "Dan Bubb" <jdbubb@ix.netcom.com>
> > =>> >To: "Rhett Farnum" <rocco_crossing@hotmail.com>, <t.piwonka@ttu.edu>,
> > =>> > <scirocco-l@scirocco.org>
> > =>> >Subject: Re: full thottle switch
> > =>> >Date: Thu, 18 Sep 2003 08:01:34 -0400
> > =>> >
> > =>> >It does not use the cold start injector!
> > =>> >The cold start injector is used only when the engine is
> > =>cranking (and not
> > =>> >always then) and no other time.
> > =>> >
> > =>> >The full throttle switch increases DPR current on CIS-E (16V), which
> > =>> >increases fuel flow through the normal injectors.
> > =>> >On CIS-lambda (8V) it increases the duty cycle of the frequency valve
> > =>again
> > =>> >increasing fuel flow through the normal injectors.
> > =>> >
> > =>> >On CIS-lambda closing the switch almost always increases
> > =>engine speed and
> > =>> >smoothes out the idle (especially if you have a big cam) because the
> > =>engine
> > =>> >goes open loop (stops looking at O2 sensor output) and richens the
> > =>mixture
> > =>> >and most engines like to idle richer than stochiometric.
> > =>> >NOTE: I guess this assumes your car is correctly tuned and FV
> > =>duty cycle
> > =>> >oscillates around 50% at idle.
> > =>> >
> > =>> >On CIS-E closing the switch again causes the engine to go open
> > =>loop. DPR
> > =>> >current is supposed to go to 16mA if engine speed is over 2500
> > =>RPM. On my
> > =>> >car DPR current goes to a steady 8mA with the car idling. I'm not
> > =>> >absolutely
> > =>> >sure how the engine will respond by closing the switch at idle. I would
> > =>> >assume if the mixture is set at 10mA (Bentley recommended setting) then
> > =>if
> > =>> >it goes to 8mA by pressing the switch the engine will lean out a little
> > =>and
> > =>> >drop a few RPM. In any event I don't think it will make a huge
> > =>difference
> > =>> >as
> > =>> >long as your mixture is tuned correctly.
> > =>> >Dan
> > =>> >
> > =>> >
> > =>> > > It uses the cold start injector. If you ahve voltage that means you
> > =>> >injector
> > =>> > > is either shot or clogged. Try fom fuel inj. cleaner and if that
> > =>doesn't
> > =>> > > work replace. ~$5 at a bone yrd.
> > =>> > >
> > =>> > >
> > =>> > >
> > =>> > > Peace Out,
> > =>> > > Rhett
> > =>> > > Rocco_crossing
> > =>> > > '83 Rocco (autocross ready, tune up, install harness, and finally I
> > =>may
> > =>> >get
> > =>> > > to makeing it look better!!)
> > =>> > >
> > =>> > >
> > =>> > >
> > =>> > >
> > =>> > >
> > =>> > > >From: "Robert Piwonka" <t.piwonka@ttu.edu>
> > =>> > > >To: "scirocco" <scirocco-l@scirocco.org>
> > =>> > > >Subject: full thottle switch
> > =>> > > >Date: Thu, 18 Sep 2003 00:48:07 -0500
> > =>> > > >
> > =>> > > >When I press the full throttle switch at idle should the car bog
> > =>down?
> > =>> > > >Cause it doesn't. However I tested the voltage on the output and I
> > =>> >gets
> > =>> > > >12v
> > =>> > > >when activated and not 12v when not, so it appears to be working.
> > =>> > > >
> > =>> > > >Also how does the full throttle switch richen the mixture? Does it
> > =>> >change
> > =>> > > >the dpr current or use the cold start injector or what?
> > =>> > > >
> > =>> > > >Thanks
> > =>> > > >Robert Piwonka
> > =>> > > >
> > =>> > > >
> > =>> > > >_______________________________________________
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> > =>> > > >Scirocco-l@scirocco.org
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> > =>> > >
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