my car is a'97 jimmy 2wd. v6. Whenever i push thebrake, the rpm of my suv rises300 rpm then it dropsabout 500rpm, to where the engine almost dies out.was just wondering what the problem could be, i bled my brakes and it didn't make a difference.

If anyone could help me out in the direction to start troubleshooting, i would appreciate it very much. THANKS FOR ALL YOUR HELP EveRYBODY!!!

 

Well your brake boost comes from vacuum, so when you apply the brake the motor looses some vacuum to the booster, so I would think that the IAC valve cannot respond fast enough to the change. I would start by cleaning the throttle body, MAF sensor, and the IAC valve. Then see what happens from there.