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Strange Brake Issue - '01 F250 PSD
Hi all, new to the forum. I'm having a weird braking issue on my 'new' 2001 f250 diesel, AT, 112k miles.
If I brake normally, the pedal will depress pretty far with minimal resistance. Once it's pretty low it will firm up and then slow the truck as normal. Sometimes the ABS light is on.
I had it at a shop and and they found a leak in rear-left brake line and fluid was low. Once that section of line was replaced it actually seemed to fix the problem- but the same issue came back just 2 days later. I took it back to them and they said it wasn't leaking. I bled both rear lines when I got home to be sure and didn't find any air.
I've found that if I quickly apply brake that the pedal will be firm immediately and will stay firm so long as I keep constant pressure on it- but as soon as I let off a bit then the pedal will lower under the weight of my foot and then firm up again when near the floor.
I've read that if the system runs low then air can get in ABS unit and needs to be bled w/ special tool or by engaging ABS and re-bleeding. So I did some hard stops on wet pavement and the ABS didn't seem to be cycling. Further confusing me, I found that after especially aggressive full stops that the truck would not accelerate afterwards- I'd then shift thru gears and push on brake pedal a few times then it would accelerate and drive as normal... this was not a one-off thing, it did it after 3 or so different hard stops.
Thanks in advance!