Ok so i just got my TSP 220/220 .581/.581 112 LSA cam in my truck and i had my tune updated by my tuner and im doing some fine tunning myselft.

my question is, if i put in gear and let off the brake it will slowly accelerate till ~1200 rpm and 20mph. What is causing this? my idle is set to 650rpm.

Also if im cruising along at like 30mph and i let off the gas, its like on cruise and it will stay at a constant speed for awhile before it starts deceleration very slowly.

I have searched and i think it may be the desired airflow is too high, but im not 100% sure.

Thanks