full thottle switch

[jdbubb at ix.netcom.com (Dan Bubb)]

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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