could be a loose power wires and when u vtak, it pushes the head unit back and loose the connextion. since it turns off, i think you should check the power wire coming out from your head unit to the power source and see if there is any damaged.

Quote Originally Posted by TOm.C View Post
when i hit vtec my headunit will turn off
then back on after 5-7 seconds when out of vtec
what could be causing this?
this is in a em1 wtih b16a
only mods to car are Pod filter and lowered.