high idle and accelerating slowly on its own

We did a head job on the durango runs great except the idle is high when in park about 2000 rpm when put in drive its wants to accelerate through 3rd gear it feels now I can hear a vacume leak it seems coming from the throttle body but when I cover my hand over it to see if there is one the truck chokes a d dies like there isnt replaced the tps cause I figured that might have been a problem being how the check engine light says tbs low circuit and another saying tps high circuit still does the same tbing clear the dam code and still there hope this is detailed enough please help