i have a 2003 with 54k miles . Lately I have had a problem driving down the freeway . I will suddenly loose power "limp mode" the slip light will come on and the service engine light comes on . Car will no regain power unless I shut the car off for a second . Any ideas ? Attached is a pic from today when it happen

 

Hoo boy- here we go again. Your Z has a sophisticated diagnostic system that will hold codes in memory to give you a clue as to what is causing 'limp mode'. Take it to a dealer or car parts store to get the codes read...

 

I did get it read Only code it gave my was pedal position sensor . That has been changed and still having the issue thus why I have resorted to the forum

 

nobody will be able to diagnose your car over the internet behind a keyboard. spend the $100 ish dollars, take it to nissan and have a proper diagnosis done