I have a 1986 F350, with approximately 130,000 miles. When I first got the truck I was told the vacuum pump was bad and that was the reason the brake pedal was soft and spongy. I replaced the vacuum pump and then noticed the rear wheel cylinders where leaking, I replaced the wheel cylinders and did a complete rear brake job, after bleeding the lines the brake pedal was still soft and spongy, after inspecting the front brakes I noticed one of the brake calipers where the wrong ones for the truck so I replaced both calipers and brake pads after bleeding the brakes the pedal was still soft, So thinking the last thing it could be was the master cylinder, I replaced it I bench bleed the master cylinder and installed it. Bleed the system and still have a soft and spongy pedal.
I’m at a lost at what to do next any suggestions?
Wednesday, November 8th, 2006 AT 1:31 PM