Tips on curing vapor lock?

[scott thomas]

Just my symptoms-got really bad with the winter oxygenated gas. I
plugged the hole on the injector cooling shroud that points to the
fuel lines. Seems to have helped very much by blowing more air on the
injectors themselves
---- Begin Original Message ----

From: "Rokas Reipa" <rokas at wam.umd.edu>
Sent: Wed, 12 Feb 2003 13:31:39 -0500
To: "Quattro List" <quattro at audifans.com>
CC: "scott thomas" <scott at dreamtheater.zzn.com>
Subject: Re: RE: Tips on curing vapor lock?


Scott,

I had the exact same problem with my old 86 5kcst. It only happened in
winter with oxygenated gas and it drove me crazy. It should be
mentioned
that I did not have the injector cooling fan operational at the time;
other
afterrun components would function. I did the exact same thing
Stephane
described(wiring a button to the cold start valve) and it worked
beautifully. The downside to this was that when coaxing the hot
engine to a
start via the button, the car would produce a huge cloud of smoke.
ANd it
makes a wonderful anti-theft device, just as Stephane described. HTH,

Rokas
93 100s


> > I've tried a bunch of things to relieve my vapor lock and it's
still
> > bad. I keep fumbling with the residual pressure valve, but the
fact
> > of vapor lock still remains. In city driving, it's very
noticeable,
> > but mostly after sitting for 1/2 hour. I have to use "special"
> > starting procedure to get the car running and purge the fuel ines
> > with cooler fuel.
> >
> > I have my injector cooling fan running. I do use a lower temp
switch
> > mounted elsewhere. Afterrun works. The rubber boot for the hoses
is
> > there. I wrapped it with foil tape. It helped some, but not that
> > much. Anyone been here before and what did you do? I'm going to
try
> > and shim the lines from the intake manifold with some silicone
> > strips to see what happens. I can raise the residual pressure, but
> > that'll leave me with harder starting, but the + is that it'll
start
> > every time.
> >
> > Any ideas?
> >
> > The Official Dream Theater Site - http://www.dreamtheater.net/
> > ___________________________________________________________
> > Get your own Web-based E-mail Service at http://www.zzn.com
> >
>
>
>
> ---- End Original Message ----
>
>
>
>
> The Official Dream Theater Site - http://www.dreamtheater.net/
> ___________________________________________________________
> Get your own Web-based E-mail Service at http://www.zzn.com
>





---- End Original Message ----




The Official Dream Theater Site - http://www.dreamtheater.net/
___________________________________________________________
Get your own Web-based E-mail Service at http://www.zzn.com