RE: [DMCForum] Re: you (yes YOU) have a vacuum leak

["Travis Goodwin" <tgoodwin@xxxxxxxxxxxx>]

Mine was dead not too long ago. A quick check:

While the engine is running, disconnect the vac hose that leads to the
distributor. While you rev the engine, put your thumb on the little nipple
sticking off of the solenoid. You should feel suction there.

I think solenoid is controlled by the throttle switch, but don't quote me
on
that.

> -----Original Message-----
> From: cruznmd [mailto:racuti1@xxxxxxxxxxxx]
> Sent: Thursday, September 18, 2003 2:45 PM
> To: DMCForum@xxxxxxxxxxxxxxx
> Subject: [DMCForum] Re: you (yes YOU) have a vacuum leak
> 
> Hm. Isn't that interesting.
> 
> Between that, and the fact that Bill says the vacuum diaphrams on the
> dizzy's are probably shot and that my weights don't fly freely I
> probably suffer from some loss of performance from this.
> 
> 
> --- In DMCForum@xxxxxxxxxxxxxxx, "Walter Coe" <Whalt@xxxx> wrote:
> > I recently tested the vacuum advance solenoids from 4 DeLoreans, and
> all of
> > them leaked air through the base of the electrical connection.  Some
> leaked
> > worse than others but ALL of them leaked.  Two of these cars are daily
> > drivers, and fixing the leak made a noticeable improvement.  I just
> sealed
> > the leaks using oxygen sensor safe silicone caulk.
> >
> > I knew I had some vacuum leaks on my daily driver, so I used a hand
> vacuum
> > pump to see if the line supplying the ignition advance and CPR held
> vacuum.
> > It didn't.  It lost vacuum as fast as I could work the pump.  The
> culprit
> > was the vacuum solenoid.  I was going to scarf one off of another
> car when I
> > found that one leaked too.  So I try yet another car and that one also
> > leaked.  Moments later a friend drove up in his DeLorean, and as he
> got out
> > of the car I said, "You have a vacuum leak!"  And sure enough he
> did.  On
> > hard acceleration his valves rattled.  He thought his valves needed
> > adjusting.  But the leak on his solenoid was bad enough that it wasn't
> > advancing enough under hard acceleration.  All of these solenoids
leaked
> > faster than I could work the pump, so that is a pretty significant
leak.
> >
> > Y'all go check your vacuum solenoids and report back how damn clever
> I am.
> > :-)
> >
> > Walt
> 
> 
> 
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