This product has received the 'Crappy Product' certificate.
Items that receive the 'Crappy Product' certificate are products that we carry for comparison purposes as they are often the version offered by other vendors or because it is the only version available. We would not be willing to use these parts on our own cars, and we do not recommend purchasing these parts.
WE ARE NOT ABLE TO ACCEPT RETURNS FOR THESE PARTS.
Product Condition Grades
Below is a general description of what the criteria is for our product condition grades. These are generalizations that are intended to give you an idea of the condition of the product at a quick glance. Because different parts degrade at different rates, there are variances in what the letters represent, please see the products description for details about the condition of any particular product.
A = Excellent / Above Average
B = Average / Some flaws / Good to Excellent Driver Quality
C = Obvious flaws / Poor to Average Driver Quality
D, E, F = Worse, Worser, Worsest
New Old Stock Original distributor vacuum advance control valve, also called a ported vacuum switch (PVS) valve, that was installed on select Ford models.
This is a NOS original electrical and vacuum operated switch. It has the FORD oval logo and part number D1AE-AA casting. This casting number is correct for select 1971 and 1972 Fords and Mercury. It was used on 302 351C and 351W engines. Because of the heavy demand placed on the cooling system by the factory air option this was mounted on the water outlet fitting. It's job was to switch the vacuum source for the distributor from the carburetor to the intake manifold when the water temperature went above normal. This would cause more advance, a faster idle and more water circulation. These are often broken or scarred by improper removal attempts. This is a rare original hard-to-find part and is a must-have item if you place your classic in Concours judged shows. Marked D1AE-AA, original Ford part number D1AZ-12A091-A.