Re: [DML] Re: Warm-up problems (spark advance solenoid)

["content22207" <brobertson@xxxx>]

You definitely do not want full vacuum to spark advance at idle. Made
that mistake when hunting a nipple to plug mine into at purchase (my
re-engine has no cut off solenoid, or any other vestiges of factory
vacuum system). What I thought was timed vacuum turned out to be full
vacuum. Advanced ever living daylights out of ignition. Only way to
get a decent idle was to over enrich fuel mixture. Percolated fine in
the driveway, but killed performance and economy as soon as car
driven. Ultimately added a nipple BEFORE throttle plates (you can see
it in #5939's photo album -- is the 3/16" hose routed drivers side of
air sensor plate before aux air valve, now routed passenger side).
Works excellent. No advance until throttle plates open.

BTW: notice spark advance is fuel line hose, and aux air valve is
extra beefy transmission hose (won't collapse under vacuum).

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, "Paul Salsbury" <paul.salsbury@xxxx>
wrote:
> Now you've got me hooked, I've always struggled to get an idle I'm happy
> with, and have settled for 1000rpm after trying many different options.
> 
> Whilst playing and adjusting last weekend I was checking all my vacuum
> connection and definitely remember that there was strong suction on the
> vacuum advance pipe when I disconnected it. car was running sat on the
> drive!
> 
> What are all the possibilities this could be and will it solve my
> problems???
> 
> Cheers
> 
> Paul
> #6463
> http://www.paul.salsbury.btinternet.co.uk
> 
> ----- Original Message -----
> From: "content22207" <brobertson@xxxx>
> To: <dmcnews@xxxxxxxxxxxxxxx>
> Sent: Wednesday, May 14, 2003 2:20 PM
> Subject: [DML] Re: Warm-up problems (spark advance solenoid)
> 
> 
> > Pull hose off spark advance diaphragm (attached to side of
> > distributor) and feel for vacuum at idle. If it's there, something's
> > wrong. Could be cut off solenoid or idle microswitch.
> >
> > Bill Robertson
> > #5939
> >
> > >--- In dmcnews@xxxxxxxxxxxxxxx, billsfanmd@xxxx wrote:
> > > I hear people talk about the spark advance solenoid located by the
> > > distributor...Looks like alittle flying saucer :-) Is there a way to
> > check to
> > > see if it is bad? mine has the vaccum lines on it and the electrical
> > plug but
> > > just wondered the failure rate and symptoms? This does not seem to
> > be a part
> > > you would normally replace on a tune-up.