Re: Vacuum

Posted by 53 Cavalier On 2023/4/16 13:45:52
Quote:

TxGoat wrote:
That sounds low to me for an engine idling in neutral. Is the gauge known to be accurate? Does the engine idle well and run well? Is the gauge connected to true manifold vacuum, and not a port on the carburetor? I'd expect a Packard 8 to run on the high side of the normal vacuum range, 20" plus or minus, at low idle of 300-400 RPM. Timing can affect vacuum, as can any engine loading, or extreme wear. An extremely worn engine would be an obvious oil burner. A stretched or slipped timing chain might cause low vacuum.


Those are all good questions. I have been thinking it should be 3-4 higher as well. Gauge, possible it's not accurate. Yes, connected to manifold vacuum. Car is idling nicely, has a bit of a miss which I believe is being caused by a sticky lifter. Timing when I got the car was whacked, sitting about about 15 degrees, rolled it back to 6 as per the manual and have since adjusted it to 7 as it seems to run just a bit better. Car is new to me, but no indication that it's burning oil and oil stays super clean. Checking my gauge may be a good place to start.

This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=255924