I just put a greddy 18g turbo kit on my del sol. It has a jdm b16 motor in it. Everything is hooked up the way it was supposed to be, but for some reason, when I go into Vtec, it starts hesitating real bad. Please let me know what I can do to fix this problem ? I am guessing it's something to do with the fuel.

 

If u haven't gotten it tuned yet I would do that before anything else.

 

whats the rest of your set-up?
Fuel spark etc...
Where is your timing set at?
What ecu are you using? stuff like that