Quote:
Originally Posted by P.C.
My father once owned a '59 Ford with vacuum-driven wipers. Really did not like the way they slowed down whenever a large throttle opening was required, such as driving uphill.
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Some cars had a alternatives where wipers had a container to store vacuum and moderate things somewhat. Also some buicks had a separate vaccum pump combined with the fuel pumps.
Otherwise the wipers went like hades going downhill and pretty much stopped on real uphill stretches. So you took your foot off the gas for a second or two so the engine could accumulate some vacuum in the intake manifold. Got a few wiper swipes and back on the gas.