So last week my brakes went out and I thought the lines may need to be bled so tonight another member of the forum came by to help with that and when we went to bleed them everytime id start pressing the brake the engine would drop rpms just wondering what this could possable be?

 

my dads 2009 toyata corolla does that.

IDK why though, just thought id throw my 2 cents

 

if your lines need bleed, there is a leak somewhere, either in a caliper, wheel cyl, master, or one of your lines are leaking, if u cant see any leaks it is prob the master.

As far as the rpms dropping, a little bit of a drop is normal, cause the brake booster is ran off engine vaccume.

 

My 92 Daily driver does that also, it has awesome brakes, I always assumed it was because you are changing the vaccum pull when you hit the brakes.