Taco run on Edgebrook in 5 days?
I changed my brake Master cylinder (87 Wagoneer) to a Raybestos brand from Rock auto, but while it seems a little better than the 3 new AZ duracrap ones I tried the last 3 years, I still have a mushy peddle with the engine running, and solid peddle with the engine off. Mushy all the way to 3/4s of the way to the floor, then it is rock hard. All new parts front and back, new rotors, new drums, new pads, new hoses, new hardware, new wheel cylinders,
and a new Vac Booster (3 years ago, about the time this started). This one is one of the worst problems I have ever had to debug. Did find bad (new and recently new) wheel cylinders from AZ. One was not leaking fluid, but was letting air in. Never seen that before, but I hear it does happen. One new AZ wheel cylinder leaked fluid right out of the box this month. Switched brands and sources to Napa.
Fixed my diesel Rear view mirror, and the 87 Wagoner drivers side electric window, Hot damn!!!! That one made my day!!! No more getting wet to buy whoppers at BK and reaching around the door, LOL!!
Also fixed a small window gasket leak on 87 Wagoner.
Now all I need is 2 new Borg eye ball implants (cataract surgery next month, they replace the lens in the eye with an artificial one) so I can dodge all the blind idiots on the road LOL, and perfectly working brakes.
Still wondering if there is a rare fault with Vac boosters that can cause this problem, but so far that makes no sense to me unless some parts of the booster are collapsing with vacuum applied, but even that is hard to picture.