how do you expect anybody to help you with the information you gave us. wait the info you didnt give us. dont mean to be a **** but you cant just say i have a problem thats says when i hit vtec it chokes? what motor you got. what ecu you have. oil level, whens the last time you changed the oil. have you ever cleaned your vtec solinoid. is your car completely warmed up before you try to hit vtec. next time please give us some more info