hydroboost delay

[izak]

Everyonce in a while I have to slam on the brakes to avoid the guy in front of me and the pedal sinks way low and I keep on rolling. Then after a second the brakes come on strong and I breathe again. It seems to happen when I havent used the brakes in a while or when I've coasted to match traffic flow. After I've used the brakes things are good and again and the pedal feels normal. Is this just a hydroboost thing? Should I change the PS fluid (or pump)?

[JeepSJ]

Sounds like more of a master cylinder problem, or air in the lines. The cheapest thing to try is bleeding the brakes. That does not sound like a problem with the booster.

[G. Gearloose]

Sloppy bearings can push the pistons in, making the first application simply a 'pump-up'.

Calipers that fail to float can do this too.

Start with the bleed, as advised..