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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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> =>> > >
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