Re: 1950 327 with Ultramatic - Idle Speed
Posted by Joe On 2023/2/6 11:38:21
I THINK it's for the starter switch. I think that's the little dark hole in the diagram. I don't see anything about in the literature dealing with the starter switch, but that seems to make some sense. I put my finger over it while the engine was running - doesn't seem to draw any vacuum, and my guess is that the check ball for the starter switch blocks the port when vacuum is present.
I wonder if I need to make an adjustment to the tongue of the anti-perc arm. I don't think the metering rods are fully seating at idle, and the pin on the vacuum piston stops on the tongue. So my current theory is that when it's in the park (and vacuum is highest), I'm getting an artificially high idle because some fuel is still making its way through the main jets. Does this seem plausible?
Attach file:
20230206_002605.jpg (213.60 KB)
I wonder if I need to make an adjustment to the tongue of the anti-perc arm. I don't think the metering rods are fully seating at idle, and the pin on the vacuum piston stops on the tongue. So my current theory is that when it's in the park (and vacuum is highest), I'm getting an artificially high idle because some fuel is still making its way through the main jets. Does this seem plausible?
Attach file:
20230206_002605.jpg (213.60 KB)
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