This time I'm going to tell about the stall or shop who sell Laksa Asam. There is 2 places that you can try out.
The 1st place I recommend is Warung Pak Din. He only sells laksa starting noon till evening. At night he will close his stall. His stall is located at Jalan AU2B.
The 2nd place is a shop located at Medan Selera Taman Setiawangsa in Jalan Setiawangsa 13. I don't remember the shop's name. But I'm aware that this shop only opens starting 6pm till late night.
So for you guys who seek laksa in setiawangsa area, you can try this out. :)