my toyota 1991 4×4 pickup surges when my foot is on the brake?

At first I check for vacuum leek and fond non the engine ideals high when foot is off of the brake when in first or 2nd gear if you take foot off of gas pedal the truck will start to buck I found no faults
checked all round the intake and the throttle body unhooked brake booster the same

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2 Responses to my toyota 1991 4×4 pickup surges when my foot is on the brake?

  1. baldie August 8, 2010 at 5:36 pm #

    did you check all vacuum hoses and around the intake?. i know you said you checked for vacuum leaks, but maybe you forgot to check somewhere, like the intake or the throttle body.

  2. Shanty J August 8, 2010 at 5:36 pm #

    warped drums or disks.