RE: [DMCForum] Another spark advance question
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RE: [DMCForum] Another spark advance question



Bill, If the micro switch on the throttle body lever is adjusted properly,
only then will the vacuum solenoid open/close because the micro switch has
un tripped and allows the vacuum allowed to go to the vacuum advance on
the
side of the ignition distributor. You should also have a idling problem if
this circuit isn't working properly, also.
Yes, If the switch isn't tripped or not working will vacuum be going to
the
ignition distributor when in the rest position and naturally if you time
it
there it will be off.
John Hervey

  -----Original Message-----
  From: content22207 [mailto:brobertson@xxxxxxxxxxxx]
  Sent: Sunday, August 17, 2003 10:18 PM
  To: DMCForum@xxxxxxxxxxxxxxx
  Subject: [DMCForum] Another spark advance question


  OK Martin:

  Stock DeLo shoots full vacuum to spark advance as soon as throttle
  plates open. If cut off solenoid is holding this, means car is timed
  at full vacuum. What happens THEN as RPM's increase and vacuum drops?

  Yes, I know there's centrifugal advance too, but seems to defeat
  purpose of any advance at all. Centrifugal advance is moving rotor one
  direction at same time vacuum advance is relaxing it the other.

  If this is truly what JZD intended, seems an owner would actually be
  better off disconnecting vacuum diaphragm altogether and simply
  letting mechanical advance do it all.

  Bill Robertson
  #5939



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