RE: [DML] Vacuum Advance Problem

["John Hervey" <john@xxxx>]

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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