I have be having trouble with the idle of my car. The motor is a 355, 11:1, cc305 cam, with a tune. Then problem is i will start the car in the morning somtimes it will fire right up othere times i will have to give it throttle. when i have to give it throttle it will not run by it self i will have to help it. But after about 30 sec it will run buy itself. After it is warmed up i go to drive it and it runs fine, untell i come to a stop then the idle will dip down to about 500 rpms then after 30 sec or sooo it will correct its self and idle ok.My tuner said to go back to relash the valve running style. the motor has about 100 miles and i lashed the valve on the motor stan. so im going to try it later, but i was woundering if this sounds correct or if there is somthing else???
thanxs grant

 

I had the same thing, that was IAC . When I come to stop, engine almost dies.