I have a 97 hb with a LS swap. The motor has i/h and an AEM alt. pulley. I was told the pulley could be my problem, but I thought I would see what yall think. When I am driving around the engine runs fine no problems. When I have to stop at lights/signs ect.. the motor will either idle very low or completely shut down. It bugs the hell out of me. I was just wondering if anyone has any suggestions. Thanks in advance.

Terry