Almost to a stall and possible voltage loss

[BoosTNThreshold]

1) I just recently replaced my ISC and it helped with my idle but the problem I have is that when I step on the gas an let off, the rpms drop and stalls out or comes close to stalling around 200-300 rpms.

2) when headlights are on and turn signal is selected, if I look at my check engine light it flickers at the same pace of the signal. What cause that? Do I need I higher amp alternator. I have no other electrical mods other the. HID low beams.

 

[DSM315]

my car did the light thing when my alternator was about to crap the bed. the battery light only came on when it crapped the bed . get that tested before replacing it though just to make sure