hard to start

[CAPESR20DET]

my car over-heated and when I fixed it, it started surging and had to adjust the timing and now it runs like crap just not pulling like it did. And when I set my base timing it runs rough and wants to stall out so I set it back and it ran great. and now it has a hard time getting started it the morning but once it started it fine If anyone can help that would be great.

thanks