With engine off--pump brake until all vacuum is exhausted With foot on brake start vehicle--brake pedal should drop
The power brake booster is leaking vacuum and that makes the engine die when the brakes are applied. Replace brake booster.
Did you check the Power Brake booster vacuum hose? Also the booster itself make have a busted diaphragm.
It sounds like a vacuum problem. Either you got a bad brake booster or the vacuum line came loose somewhere or cracked when you changed the booster.
To vacuum test a brake booster, first ensure the engine is off and the brake pedal is fully depressed to release any residual pressure. Next, disconnect the vacuum hose from the brake booster and attach a hand-held vacuum pump to the booster’s vacuum port. Apply vacuum using the pump; the gauge should hold steady pressure if the booster is functioning properly. If the vacuum drops significantly, it indicates a leak or failure in the brake booster.
If you have a power brake booster then there will be a vaccum line that runs to the brake booster on the firewall from the carburator. Check the booster for holes and broken fittings or buy a new booster. if no brake booster then brakes shouldn't affect vaccum
From the booster, to a vacuum source on the engine.
Faulty Vacuum Power Brake Booster
you need manifold vacuum for the brake booster.. (intake manifold)
If you have a booster you need a vacuum line to perform effectively, disc or drum.
Remove brake lines from master cylinder. Remove the two bolts attaching master cylinder to vacuum booster. remove vacuum hose from vacuum booster. It just pulls out of booster but will give you a little resistence. Remove cover above gas and brake pedals on drivers side floor board. While laying on your back or right arm look up into dash and find and disconnect brake pedal linkage/rod from brake pedal (there is usually a pin with a clip holding this together). Then remove 4 bolts attaching vacuum booster to fire wall. Go back under hood and remove vacuum booster.
i know one hooks to the brake booster on chevrolet's and toyota's. just follow it from there.
The power brake vacuum booster is failing.