Re: [DML] Vacuum Advance Problem

["content22207" <brobertson@xxxx>]

Clarification? I believe John is telling you to suck on a hose with
your mouth (need a new piece because one to vacuum cut off solenoid is
too short). If the diaphragm has a hole, you'll be able to keep
sucking breath after breath. If it's good, you'll only get one breath
then it'll hold. This same technique works excellent when cap is off
-- you can actually see the rotor button move (spark advance diaphragm
can be good but disconnected from plate. Don't know about PRV, but
older Fords only held on by world's smallest E-clip).

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, "John Hervey" <john@xxxx> wrote:
> Mike, What your hearing ( Clicking sound )is most likely the Vacuum
solenoid
> behind the fuel distributor cutting on and off. That tells you the micro
> switch for the idle speed is working. That's what's it supposed to
do. If
> your timing isn't advancing then there could be a broken diaphragm
in the
> vacuum advance solenoid on the side of the ignition distributor.
It's easy
> to test by putting a hose on to it and by sucking the air out you
will feel
> a restriction. If no restriction, then it's bad.
> John Hervey
> www.specialTauto.com
> 
> 
> 
> -----Original Message-----
> From: MPolzin@xxxx [mailto:MPolzin@xxxx]
> Sent: Thursday, April 24, 2003 10:35 AM
> To: dmcnews@xxxxxxxxxxxxxxx
> Subject: [DML] Vacuum Advance Problem
> 
> 
> Just to give a bit of background, I have just completed replacing
the engine
> on my one of my Deloreans due to severe engine damage caused by the
previous
> owner. I picked up a used engine with 22K miles on it, and installed
this in
> the car, and an having an issue with the vacuum advance.
> 
> The car starts right up, and runs well when it is cold. When cold it
runs
> normal, idle is normal, and there is no unsual sounds. As soon as
the car
> warms up and the vacuum advance kicks in on the distrubutor to
advance the
> timing, I can hear a clicking sound coming from the distributor. It
sounds
> like metal on metal, and the timing is not being advanced as it
should. If I
> put my hand on the distributor I can feel it rumbling a bit as if it is
> trying to advance the timing but fails, and retrys, etc.
> 
> Anyone have an idea as to what might be causing this? My next step is to
> pull the intake off and pull the distributor assemly out and take a
look at
> it, but I've never done anything with a 'D' distributor so I'm not
sure if
> this is something that I might be able to service or not?
> 
> One thing I did notice when I got the engine was that the rotor was
broken,
> so I'm curious if the distributor could be damaged by dropping
something on
> it (thus the broken rotor and perhaps damaged distributor)?
> 
> Anyone know if you can pick up a replacement Bosch distributor at
Pep Boys
> or another auto store, or Boch part number for it? Thanks
> 
> This car is inches from seeing the road for the first time in three
years,
> so any help would be appreciated.
> 
> Mike Polzin
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
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