Why Does Replacing Idle Air Control Valve on 2002 Ford F150 not correct Idle issue?

Got A check engine light. Code said Idle Air Contol Valve. Purchased A control valve at parts store. Replaced control valve with new one. Engine Idled up real high. Attempted driving, thought computer had to reset. Engine still idled up too high. Parts store said vehicle had to be driven for at least 20 miles for control valve to operate correctly. Drove truck 30 miles, engine started to surge. Put old control valve back in and engine does not idle high or surge but stalls out.( suggestions) ?

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