The Project is coming along

[mardak at cogeco.ca (Mark)]

> -----Original Message-----
> From: tomc [mailto:tomc@satx.rr.com]
> Sent: Tuesday, September 02, 2003 9:48 AM
> To: Mark
> Cc: Scirocco list; Texas Scirocco Team
> Subject: RE: The Project is coming along
>
>
> Ok, I don't think that's my problem then. I have a consistent 1300rpm
> whether warm or cold,


If the idle bypass is stuck, the idle will start out high (normal) AND
remain high after the car is warmed up.  I would try disconnecting it and
plugging the hoses before screwing with your fuel/air mixture...


> I also don't have the fluctuation indicative of a
> vacuum leak.


What do you mean by fluctuation?  If you have unmetered air entering at some
point after the airbox this will raise your idle.  As long as the vacuum
leak is consistent, you idle speed will be smooth - just higher.


> I'm pretty sure if I set my timing with no advance it will
> idle at 900, I'll try it later to be sure. I may just need to play
> around with the fuel/air mixture.


That would be the last thing I would screw around with.  Vacuum leaks can be
tricky to track down.  Are there any cracks in your rubber boots?  Clamps
all tight?  Injector seals in good shape and seated all the way in?  Small
vacuum lines free of cracks (the "cloth" material covering the ends
sometimes hides cracks in the rubber underneath)?  Only after you're
absolutely sure you don't have any type of vacuum leak (including a faulty
idle bypass) would I suspect that the fuel/air mixture is too rich...

Maybe try asking your question again under a separate subject heading -
someone else might chime in that wasn't following this thread...

HTH!

Mark.
80 S
81 S ABA/JH/4K


> On Tue, 2003-09-02 at 14:16, Mark wrote:
> > > -----Original Message-----
> > > From: tomc [mailto:tomc@satx.rr.com]
> > > Sent: Tuesday, September 02, 2003 6:44 AM
> > > To: Mark
> > > Cc: Scirocco list; Texas Scirocco Team
> > > Subject: RE: The Project is coming along
> > >
> > >
> > > Thanks all for the help, I thought that dohickey thing was
> for the lamba
> > > system (no really I did!). Anyway, I'll just put my fuel dizzy on the
> > > airbox for now. I'll want a lamba system down the road
> sometime though.
> > >
> > > As for my other problem, I checked my vacuum lines (what's
> left of them)
> > > I don't see any leaks, however I have a good vacuum at the front of my
> > > intake manifold and nothing at the rear. Removing the line that goes
> > > from the back to the vacuum advance on the dizzy does nothing to the
> > > idle or timing for that matter, I was under the impression that it
> > > should though. Is this a stuck idle bypass? and if so how do
> I un-stuck
> > > it?
> >
> > In my experience once the bypass is "stuck" it's no good
> anymore.  To test
> > if this is your problem, remove it and plug both hoses (PP
> bolts work good
> > for this IIRC).  If the idle goes down now, that's your problem
> (or at least
> > part of it :-)
> >
> > If you want to check the operation of the bypass valve, apply
> 12 volts to
> > it, wait for bit, and see if you can blow through it.  If you can,
> > bypass-a-no-good...
> >
> > Mark.
> > 80 S
> > 81 S ABA/JH/4K
> >
> >
>