I have a 1994 Honda Civic Ex with a JDM15b Vtec, very similar to the D16z6.

Ok i have an issue with my idle at stop lights, after being nice and warm when i come to a stop light the cars idle surges from about say 500 to 750, but it feels like it wants to die. I swapped the IACV and Fast Idle Valve already. What other problems could it be? I still have to flush my coolant for air. I replaced my plugs already, and am doing a wire replacement soon. Also i noticed sometimes when in 2nd or 3rd etc.. if i accelerate then let off the gas and try to re-accelerate it becomes very sluggish. I also know my timing is 18 degrees and not 16, could this be the issue?