i just took a ls/tec out of my 97 civic dx because i couldn't get the vtec to work so i put a b16 in it and the vtec doesn't workin on this either what could it be never had the problem with it in my other cars that i have done swaps in

 

oh geez...this should be simple....I would say...your vtec actuation pins are worn and locked in their cylinders.

For real...how about a little more info, the more in depth the better

Things like ECU you are using, engine harness you are using...Get it?

 

Did you check your oil level? What ecu is being used and i can't believe you went through all the trouble of yanking an ls/vtec just cause the vtec wasn't functioning.