when i try to do a brake stand or stop real hard, the brake pedal gets extremly hard and i cant hold the car an break the tires loose

and i have a real uneaven idle, i just had the stall put in i know that has to do with part of it.

my check eng light comes on and i had it checked out and it says the the dr side o2 is reading a lean mixture once and a while


it all sound's like to a Vacuum prob, what do you guys think

if you have had any cam work done that will affect vacuum big time, if your converter stall is really high youll have to get the revs up to get the tires goin anyway

no stock engine, i hade to move the brake boost to put the uppers on, but we hooked every thing up right

the stall will have nothing to do with your idle.........and it should make breaking your tires loose a lot easier

brake pedal still gets rock hard and i cant hold the car

You're loosing vacuum or your brake booster is going bad. You need a vacuum guage to test.