So last week when i was driving home from work my car started missing and throwing a code for the number 3 cop. after looking closer i found the the back of the intake manifold was leaking coolant into the plug boot causing the misfire. so i ordered a replacement ford racing pi intake and installed it today with new gaskets and thermostat. The car fired right up but was smoking a lot at first(i assume it was from some coolant probably getting into the intake runner). after it warmed up the smoke went away but im getting a small hesitation under a load around 4000 rpm mainly in 2 and 3 gear. i have double checked all of the connections and checked for air leaks. im running out of ideas, it ran fine before i swapped out the intake. Anybody have any other suggestions ?