Hi.
I bleed the front left line just to test out the bleeder and to clear
the probably oem fluid in the reservoir.

Drove it for about a week.

Now I'm doing a full system flush.

From what I'm reading I need to disconnect batt. and do it in this order.

Rear right
Front left
Rear left
Front right.

My problem is.... A ton of bubbles came out doing the front left this time.
Is this because I did not disconnect the batt. the first time.? Because I did this one out of order? The manual says do disconnect the batt. and do it in order for a reason, but is this the reason specifically or what do you guys think?

 

Did you by chance run the reservoir a little low? It will suck in air before it's empty.

 

idk, could be.
Can't recall if the res. was full when I bleed it for the final open/close.

 

Disconnecting the battery is just a safety precaution. Having it connected while bleeding the brakes did not cause the air bubbles.