I posted a thread awhile back about this problem, but it went away on it's own for about a month. Now it's back. With a vengeance.
While driving Friday the pedal went to the floor and the BRAKE light came on. I checked the fluid and it hasn't moved at all in the last 5 weeks. There are NO leaks anywhere in the lines, I've checked more times then I probably needed to.
After researching a little bit I replaced the proportioning valve thinking maybe it locked up, disabling flow to the rear. This morning after I re-bled all 4 lines from rear to front, the rear bleeders don't squirt any fluid. It just seeps a tiny bit when I loosen them which I figure is just fluid sitting in the caliper.
I don't seem to have any symptoms of a bad master cylinder because it goes to the floor every single time and there's no fluid loss anywhere.
I really don't want to take it to a garage and get charged for something that is probably really simple. Is there a giant air pocket somewhere? I tried line bleeding the ABS pump with no success. The booster is putting out tons of vacuum suction when I unplug the hose.
Am I overlooking something or is there a bigger problem that the dealership needs to deal with? The rear rotors are ice cold after driving around town, and the front are working overtime and the wheels start getting warm.
Help my poor ZJ.