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Re: Hot Start Problem



This is not the hot start relay I was talking about.  I realize there is an
overlap in terminology here.  The relay I am talking about basically allows
a larger wire to the solenoid via a relay, whose power is controlled by, not
routed through, the ignition switch.

Thanks.
Brian
----- Original Message -----
From: Marc Peterson <mpeters6@rochester.rr.com>
To: <scirocco-l@scirocco.org>
Sent: Saturday, September 08, 2001 2:30 PM
Subject: Re: Hot Start Problem


> The hot start relay basically causes the cold start injector to pluse once
> every few seconds, dumping extra fuel into the intake.  Should help the
> engine fire on warm restarts.  It doesn't have anything to do with
cranking
> speed.  If you did have an issue with cranking speed on a hot engine, I
> would assume that the starter was getting heak-soaked, or the starter
itself
> was going.
> Most California FI MK1's have a hot start relay wired in parallel with the
> thermo time switch.  This allows the cold start injector to pulse even
> though the thermo time switch isn't calling for it.
> Of course, this is all for MK1 8V's.
>
> Marc
>
> ----- Original Message -----
> From: "Brian Haygood" <Scirious@hotmail.com>
> To: "Scirocco-l" <Scirocco-l@scirocco.org>
> Sent: Saturday, September 08, 2001 1:58 PM
> Subject: Hot Start Problem
>
>
> > I searched the archives, and I'm wondering whether a hot start relay
will
> > help this problem.  It's an '87 16v.  I've followed Bentley's checks for
> the
> > cold start injector and rest position of the air flow plate.  Once
started
> > the car always runs well and strongly.
> >
> >  My car's ability to start varies with temperature.  On colder days
(70's
> or
> > so) it fires on the first turn or two.  When it's around the mid 80's it
> > takes a several turns for a cold engine to fire.  If I drive the car
> around
> > a while (up to operating temps) on a warm day, and try to restart it
> within
> > about 5 minutes, it will start very reluctantly.  If I let it heat soak
> for
> > 30 minutes or so, it will turn over forever and never fire, though
> > occaisionally it will sputter on the first crank or two.
> >
> >  I have tried push starting it twice and both times it started right up,
> > though the cranking speed of the engine seems pretty good, and I can
crank
> > it for quite a while (10 seconds) without it slowing down.
> >
> >  So it sounds to me like something in their doesn't like being heat
> soaked.
> > The archives mention that putting a hot start relay in the ignition
> > somewhere fixes a heat soak problem, but it sounded to me like this was
a
> > fix for cars that refused to turn over.  Mine turns over pretty well in
> any
> > condition.
> >
> >  I don't believe this is a fuel accumulator problem because it relates
> more
> > strongly to temperature than to time.  If the car is allowed to cool it
> > starts well.  I have not checked the screw on the back of the
accumulator
> > for leaks, yet.
> >
> >  If anyone can verify that I need a hot start relay, could you also tell
> me
> > where to get the relay, where it wires in, etc.  Also, would this same
> > problem disappear if I just replaced some wiring and didn't put in a
> relay?
> >  Thanks for your help, listers.
> >
> >  Sincerely;
> >  Brian Haygood
> >
> >
> >
> > --
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> >
> >
>
>
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>
>

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