Probbaly nothing to do with a vacuum one-way valve in this instance. But some vehicles will have a vacuum accumulator to keep them servoing a bit longer after an engine cutout.
subaru stalling
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The brakes will always loose their servo effect without the vacuum from an idling engine. Just push HARDER, like we use to before brake servos and power steering (which wasn't that long ago)
Probbaly nothing to do with a vacuum one-way valve in this instance. But some vehicles will have a vacuum accumulator to keep them servoing a bit longer after an engine cutout.
Probbaly nothing to do with a vacuum one-way valve in this instance. But some vehicles will have a vacuum accumulator to keep them servoing a bit longer after an engine cutout.
The 80-90 Tech Wikipedia Your 1st port of call
Syncro Kastenwagen / 16" Kombi Camper
Syncronaut No. 1
Thanks for reporting back and clearing that up, so two problems really and interrelated 
The 80-90 Tech Wikipedia Your 1st port of call
Syncro Kastenwagen / 16" Kombi Camper
Syncronaut No. 1