rough idle after l67 swap.
#1
rough idle after l67 swap.
I swapped out the motor in my 02 Monte Carlo SS for one out of a 99 gtp. After the swap the motor will jump from 600 rpm to over 1000. While it does this it black smokes as if its loading up. After awhile it will idle out right and stop smoking but it don't take long before it does it again. I switched the tb with the original but it doesn't help. I haven't switched the computer out or have this one tuned yet. Is this a common issue or is it just that I need a computer out of gtp to make it run smooth? Thanks