I swapped to the optima yellow top battery when I installed my FMIC, I remounted my foglights and they are working. But everytime I boost , it blows my foglight fuse. Why is this happening?

 

Well ... you're not supposed to blow boost through the fuse box! Yeah, I know, I'm a wise-***. I would have to guess (maybe this is a dumb guess), that it's not a function of boost, that it's a function of acceleration. I have to bet that you're shorting something, and the forces during acceleration are causing wires to touch off on something. The wires being something related to the fog light work you just did. Recheck all that wiring, tape any areas that might have an issue.

The reason this comes to mind is that, when I first got mine painted and some body work done, the yaywhos who did the body work left (what turned out to be) my left front parking light wires dangling and touchching structure. Everytime they turned on the lights, that fuse and (seems like) some other stuff would blow. Those geniuses couldn't figure it out. I had to tear through the front end to figure it out after I got the car back. Of course this is not exactly the same failure mode, mine was activating circuits, yours is boost or force related.

Anywho, sorry for the long reply. Check out your wiring work real good.

 

That sounds like a good place to start. I guess I could've worded it better :P. Thanks.