The Ford Barn - View Single Post - PLEASE HELP

Greg Jones · 10-12-2012, 05:59 PM

Well here is the standard answer: "Could be a lot of things." Of course, that is not helpful. How is your timing? Are you sure it is timed right? Sometimes I have seen cases where timing is set too far advanced, the car will rock and roll and it feels like it is coming from the flywheel (which it is). A Model A timed right should idle with the spark lever no more than halfway down the quadrant (and that is a bit much in my opinion). For general running on the highway spark lever should advance about 2/3 of the way down the quadrant. Only when running at self-destruct speeds should the spark be fully advanced. Now, this is with Snyder and Brumfield 5.5 and 5.9 heads which require less advance. I ramble on about this just to ask if maybe your Dad is running too advanced at low speeds, such as at idle?

10-12-2012, 05:59 PM	#11
Greg Jones Senior Member Join Date: Jul 2010 Location: Aiken, South Carolina Posts: 698	Re: PLEASE HELP - 1931 Cabriolet noise identification Well here is the standard answer: "Could be a lot of things." Of course, that is not helpful. How is your timing? Are you sure it is timed right? Sometimes I have seen cases where timing is set too far advanced, the car will rock and roll and it feels like it is coming from the flywheel (which it is). A Model A timed right should idle with the spark lever no more than halfway down the quadrant (and that is a bit much in my opinion). For general running on the highway spark lever should advance about 2/3 of the way down the quadrant. Only when running at self-destruct speeds should the spark be fully advanced. Now, this is with Snyder and Brumfield 5.5 and 5.9 heads which require less advance. I ramble on about this just to ask if maybe your Dad is running too advanced at low speeds, such as at idle?