That innovation which is achieved when innovators overlap layers of meaning in terms of its interpretation and creativity within a given context. With that in mind, a few days ago I read an article on the characteristics of independent artists (http://www.revistaarcadia.com/impresa/especial/articulo/el-momento-indep...
A canister purge valve is a solenoid valve controlled by the Power Train Control Module. The Power Train Control Module is a control unit that determines the ignition timing, fuel amounts and other parameters needed to keep the engine running.
In the case of the above Ford engines, the camshaft has sixteen lobes  one to control an intake valve and an exhaust valve for each of the eight cylinders. The engine block has sixteen small holes in the top (in between the cylinder banks) that fit lifters (also called tappets).