Booster dropping rpm's

[ajsmolik]

1971 f100 360

I also just finished installing a junkyard booster. Everything went smoothly. I'd have to say I'm disappointed. There must be a problem.

First off, the pedal is much closer to the floor (I've read about this one already) but the pedal also doesn't have much travel when I apply the brakes. I apply about as much force as I did without the booster.

What's got me wondering is the rpm's actually drop when I step on the brake. The motor idles too slow and stalls when I stand on the brake. I don't hear a vacuum leak - Should I bump up my idle speed? (~700 now) Is the booster bad? -or- Is this as good as it gets?

[spartman]

Sounds like the booster is bad.

I think you can just replace the pancake inside and all would be well.

Otherwise for simplicities sake just get a new/rebuilt one from a parts store and use yours as a core for it.

[heep70]

The diaphram is bad in the booster. Spartman is right.

[spartman]

FINALLY SOMEONE REALIZES I AM RIGHT!!!!!

Just don't tell my wife she would never believe it.

[heep70]

Calm down. It is a good feeling isn't it. Just don't let your nose get cold while it is stuck in the clouds.

[68F250]

Junkyard booster is bad. Does your junkyard have an exchange policy for bad parts? If so you could try again.

[fordman]

thats what i would try first. trade it back to the yard for another one.

[cobraF100]

Well find out what your Parts Store will give you as a Core charge and maybe just use it to Buy a New One...Thats what I did..

[spartman]

I never realized when I got married I suddenly would be wrong about everything!!!