I unplugged my hondata s300 ecu on my turbo ls/vtec sol, and now it won't start. Not experienced at all, this is my first turboed honda, how do i upload a previous tune onto the ecu to see if it will start then?

 

unplugging it wont take the tune off of the ecu. you have another issue unless you connected to the ecu and cleaned it out then yoru screwed unless you saved you tune on your laptop previsouly

 

I just unplugged it moved it then plugged it in...when i plug my laptop into it i can see aprox. 20 previous tunes but I cannot figure out how to put a new tune on...

 

There is no way to see "20 previous tunes".
Unplugging the ecu would not cause you to loose your tune however if you uploaded any of the basemaps in the smanager software you would have overwritten the tune that was on your ecu.

Contact your local hondata dealer for a solution to your problem.

 

Or make sure the plugs are fully seated into the ECU connector. Did you do any other work to the car while the ECU was out?