Engine dying with brakes issue

[KyleSeal]

I have a K30 with a big cammed 454, 4 speed, with hydroboost brakes. Lately Ive been having some issues. When I give partial brake, like coming up to a stop light while in neutral, the whole truck will shake some and then the idle will drop to about 1500 and virtually drop all the way down to 200 rpm like its going to die. I am still able to keep it going by giving some gas but this has become an issue because it makes the truck impossible in traffic.

All fluids are topped off, could there be air in the system? I heard theres a diaphragm in the hydroboost system that tends to stick, causing something like this.

Does anyone have any pictures of the hydroboost system showing where such diaphragm is?

Another part to this issue is that the motor will try and die when turning the wheel while sitting still. Like it kills it. I know it puts some strain on the system but I dont feel that much strain is coming from a single turn of the wheel.


454, 4 speed, 6 inch lift with 35s.