How do I replace the PTO valve, and where is it located? on 1996 Ford Taurus

It stalls when i press the gas to accelerate but if i press it to the floor it takes off.

Asked by for the 1996 Ford Taurus
I don't know this either "power take off valve"? There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate
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PTO??? please explain as there is no such valve that I know of.