97 FZJ80
Brake pads are good. Fluid is new and topped off and recently bled. Fluid level hasn't gone down so I don't suspect a fluid leak.
Last night on the trail in Anza Borrego, my brake pedal got rock hard and it took a lot of foot pressure to stop the truck. Can't find anything about this when searching.
Symptoms: When driving, at first the brake pedal behaves normally as I start braking (ie for a stoplight). Then, while I'm still slowing down, the pedal gets very stiff and i have to push on it very hard to get the truck to stop. Once stopped, with my foot still on the pedal, the pedal starts pushing out against my foot to the point where it takes a lot of pressure on the pedal to stay stopped at the stoplight against just the normal idling.
Once I start driving again, the brakes are normal at first and then the symptoms repeat. Once the hard pedal thing happens, and I press harder on the pedal to try to stop, there is an audible sound of air releasing somewhere around the foot pedal.
When the pedal first get's hard and I give it a firm push, it feels almost as if I've "pushed through" the stiffness and then it gets a little easier to press until I've stopped at which point the pedal pushes back against my foot as described earlier.
Recent work on the truck: replaced brake fluid 2 weeks ago with synthetic - no brake issues after. Also new springs but little change in lift amount (about 3"). Had the stealership attempt a front end alignment, but they supposedly were unable to break the adjustment loose. I doubt this is relevant but thought I should mention it.
Brakes were fine on the way out to the desert. problem occured after easy trail driving.
Any help is much appreciated.
Brake pads are good. Fluid is new and topped off and recently bled. Fluid level hasn't gone down so I don't suspect a fluid leak.
Last night on the trail in Anza Borrego, my brake pedal got rock hard and it took a lot of foot pressure to stop the truck. Can't find anything about this when searching.
Symptoms: When driving, at first the brake pedal behaves normally as I start braking (ie for a stoplight). Then, while I'm still slowing down, the pedal gets very stiff and i have to push on it very hard to get the truck to stop. Once stopped, with my foot still on the pedal, the pedal starts pushing out against my foot to the point where it takes a lot of pressure on the pedal to stay stopped at the stoplight against just the normal idling.
Once I start driving again, the brakes are normal at first and then the symptoms repeat. Once the hard pedal thing happens, and I press harder on the pedal to try to stop, there is an audible sound of air releasing somewhere around the foot pedal.
When the pedal first get's hard and I give it a firm push, it feels almost as if I've "pushed through" the stiffness and then it gets a little easier to press until I've stopped at which point the pedal pushes back against my foot as described earlier.
Recent work on the truck: replaced brake fluid 2 weeks ago with synthetic - no brake issues after. Also new springs but little change in lift amount (about 3"). Had the stealership attempt a front end alignment, but they supposedly were unable to break the adjustment loose. I doubt this is relevant but thought I should mention it.
Brakes were fine on the way out to the desert. problem occured after easy trail driving.
Any help is much appreciated.