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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
The change in idle would be significant and about 300rpm.

Thus, your Vacuum-Retard function is not working. Rust indicates it is probably the pot.

You can take a piece of tubbing, install in on the nipple on the pot facing the dist.

Put the other end in you mouth, suck to create a vacuum and stick the end of the tube on your tong to seal it. If it holds a vacuum the pot is ok. If not you have a leak and need to send about $180 for a new pot.

Of course, if you have a cheap hand vacuum pump with a gage on it, that might be better.

You could also put a vacuum gage on the tube from the solenoid. Start the car. For the first about 10 sec you will see not vac. After that you will see vac when the valve opens.

The best.
Old 10-01-2009, 03:06 PM
  Pelican Parts Technical Article Directory    Reply With Quote #25 (permalink)