full thottle switch

[rocco_crossing at hotmail.com (Rhett Farnum)]

I will ahve to take a look at that agian and see if thats another thing I 
need to fix.


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 12:07:32 -0400
>
>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
> > > > >
> > > > >
> > > > >_______________________________________________
> > > > >Scirocco-l mailing list
> > > > >Scirocco-l@scirocco.org
> > > > >http://neubayern.net/mailman/listinfo/scirocco-l
> > > >
> > > > _________________________________________________________________
> > > > Get 10MB of e-mail storage! Sign up for Hotmail Extra Storage.
> > > > http://join.msn.com/?PAGE=features/es
> > > >
> > > >
> > > > _______________________________________________
> > > > Scirocco-l mailing list
> > > > Scirocco-l@scirocco.org
> > > > http://neubayern.net/mailman/listinfo/scirocco-l
> > >
> > >
> >
> > _________________________________________________________________
> > Express yourself with MSN Messenger 6.0 -- download now!
> > http://www.msnmessenger-download.com/tracking/reach_general
> >
>
>

_________________________________________________________________
Express yourself with MSN Messenger 6.0 -- download now! 
http://www.msnmessenger-download.com/tracking/reach_general