Ok the other day I was running my AC and you know how at stoplights you can feel it shutting off and on based on the viberations or whatever. Well the other day I noticed as it was doing that my brake started depressing. Well not really depressing my foot was on the brake and it moved without me changing the force I was applying. After the light went green and I started driving the car seemed to brake fine but I was wondering what would cause that to happen?

 

For some reason that happens to me occasionally too, it's happened occasionally in every car I ever drove in fact. If it happens all the time though then it could be a problem, maybe the power brake booser? But just guessing. Like you said it seemed fine afterwards.

 

Yeah and see I was away last summer and didnt drive my car much but I kind of remember it happening but I guess I just dont get how they could be connected to each other you know?

 

They arent connected to each other. what you most likely felt was due to the motor dropping rpm slightly from the ac cycling and the slight loss of brake boost vacuum.

 

If you have been Seafoaming- check the end of the vac line for swelling from the solvent.
Easy to remove engine cover-4 bolts- and replace the 3 feet of hose- I did mine for fun.
Smallest amount of leak anywhere will make the car run funny

 

Ah cool thanks for the respondes guys glad to know im ok.