I have a code 6814 turbo control valve were is it

What is your question?

at first i had 2 codes 1 for mass air flow turbo control valve I replaced mass air flow.When first start up for first half mile ok then will shut off wile driving start in up some times give it throttle it will die sometimes go very easy to get back to were you were may take restarting 5to10 times to get there