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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
It seems condensation can drip down the boost retard hose to the pressure pot. Thus, there is potential for it to rot out on that side at least. A long enough tube with a loop at the bottom might reduce that potential.

Checking operation buy verifying timing at idle as Mark notes would seem important.

But what about verifying 'boost retard' is working correctly.

This would require a hand pump. If the vac retard side (inner) is disconnected idle should increase. that by its self and also tells us vac retard is working.

Then adding pressure to the boost retard side (outer) with a hand pump sould retard and bring idle rpm back down. Better to observe at the timing mark.

Then there is the solenoid on the Vac-Ret side of the double pot dist. It would be good to be sure it is working correctly as this may be necessary to block vac-retard to ensure we get boost retard. (not verified)

As noted by Dave, these ignitions are getting pretty dated. Verifying that all functions work might be a good idea. Especially anything relating to boost timing.
Old 04-03-2010, 08:45 AM
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