SolidState
No Mo SHO
I have come across an odd problem with the braking system on my 91.
Every so often, and increasingly so, the brake pedal will firm up, and the brake(s) with drag a little. When stopped, if I pump the brakes a couple times, they will return to normal.
A couple of observations:
- This started to occur after I replaced my heater core. The importance here is that I snapped the plastic fitting that attaches the HVAC vacuum tube to the hard plastic vacuum line that leads to the 'S' port on Vacuum Distribution Manifold. I replaced the union with an actual ford part, but butchered the lines a little bit replacing it. It doesn't appear to be leaking.
- A previous owner of the vehicle placed a helper spring on the brake pedal to help the pedal return. It doesn't seem to suffer from that problem, but I haven't removed it yet.
- Last week, I had the parking brake cable on the drivers side snag the sway bar link, and cause the caliper to lock up. The caliper got hot enough that it melted the slider boots and piston dust boot before I realized what happened.
- I am trying to track down an issue with the rear secondaries not closing all the way. Doesn't appear to be a vacuum leak.
- Cruise control isn't terribly responsive, although I have come to expect that in an MTX SHO.
FWIW, I have NOS OEM calipers on the way, cobra fronts, earls lines, newer parking brake cables that I am installing momentarily. I would just hate to do all that work, then find out that it was the booster or master cylinder.
Any ideas would be great. TIA
Every so often, and increasingly so, the brake pedal will firm up, and the brake(s) with drag a little. When stopped, if I pump the brakes a couple times, they will return to normal.
A couple of observations:
- This started to occur after I replaced my heater core. The importance here is that I snapped the plastic fitting that attaches the HVAC vacuum tube to the hard plastic vacuum line that leads to the 'S' port on Vacuum Distribution Manifold. I replaced the union with an actual ford part, but butchered the lines a little bit replacing it. It doesn't appear to be leaking.
- A previous owner of the vehicle placed a helper spring on the brake pedal to help the pedal return. It doesn't seem to suffer from that problem, but I haven't removed it yet.
- Last week, I had the parking brake cable on the drivers side snag the sway bar link, and cause the caliper to lock up. The caliper got hot enough that it melted the slider boots and piston dust boot before I realized what happened.
- I am trying to track down an issue with the rear secondaries not closing all the way. Doesn't appear to be a vacuum leak.
- Cruise control isn't terribly responsive, although I have come to expect that in an MTX SHO.
FWIW, I have NOS OEM calipers on the way, cobra fronts, earls lines, newer parking brake cables that I am installing momentarily. I would just hate to do all that work, then find out that it was the booster or master cylinder.
Any ideas would be great. TIA
