Re: Miss at Idle

Posted by Tim Cole On 2013/3/13 15:14:59

The point about 16inhg vacuum being in the no fault range is well taken considering the possibility of gauge error.

However, as previously noted there is a small leak at #1.
That should be addressed. After that the choke stove will leak and cause problems. On the EE-23 Stombergs if there is a leak between the castings that will cut out four whole cylinders (don't ask me why).

The idle spec from Packard always bothered me because of low splash and I always set them higher unless specifically requested.

Also, the damper can shift and give the wrong timing. Too far advanced will miss. The timing light should be steady and any fluctation the game is over until the distributor is rebuilt and rechecked.

As far as the advancing timing on old motors, well the compression doesn't look old to me and given Packard was squeezing every last horsepower out of that engine I would be very suprised if a dyno would demonstrate the need for advancement.

In modern cars even small undetectible vacuum leaks will cause problems so I would address what you have already found.