Joe94xj
NAXJA Forum User
- Location
- colorado Springs
Missed that part.
Pumped more than Arnold on a housekeeper.....Try pumping the pedal a lot ... all the way to the floor ... like 10 times, then check your fluid level in the MC. If it goes down, you have a leak somewhere, if not, you have a different problem. If your pedal gets firmer after a lot of pumping, then you need to bleed more.
Are your calipers seated properly ... is there anything that might be pulling your pads away from the rotors when you let up on the pedal? Too much travel would also cause the pedal to go to the floor.
Another question, has this combination of components worked in the past? Or did you just put them together and they aren't working?
I'm asking these questions to try to isolate the problem.
Yes it's a stock M/C.
Fade: Peddle slowly goes to the floor.
This is a fault described in the FSM Master Cylinder/Brake Booster Diagnosis.
Here's an excerpt from the FSM:
"Start engine and note pedal action it should fall away slightly under light foot pressure then hold firm. If no pedal action is discernible, power booster, vacuum supply, or vacuum check valve is faulty."
Check for leaks at the brake booster to intake manifold hose, remove and inspect the check valve function. If no leaks are found and the check valve functions normally, I would suspect a bad brake booster.
I'll be in touch.Not an ideal thing to do but if you can pinch off your brake hoses all at once and pump the pedal it will help you narrow down your issue.
No, not really. Unit bearing hubs have been replaced with Manual hubs and assorted parts from a variety of vehicles, but a common swap to get to 5 on 5.5.You can always do the on-car m/c bleed.. same as at the wheels, just messier. Have someone turn the fittings loose while you run the pedal. I do like the idea of putting plugs in the m/c outlets and seeing if you have the same pedal feel. I'll see if I can find some plugs...
Booster test, engine off pump multiple times until the pedal gets solid- if it doesn't don't bother continuing. Start the engine, pedal should drop some. It doesn't get solid and will keep moving toward the floor
Once upon a time in a land not all that far away, I had a front wheel bearing go out. The Jeep would pull left until you got on the brakes, and it took a couple of pumps to get a good pedal. The rotor would tilt and push the pads back, a few pedal pumps would stand the wheel up straight. Any chance of some odd mechanical issue along similar lines?
Not an ideal thing to do but if you can pinch off your brake hoses all at once and pump the pedal it will help you narrow down your issue.
Pumped more than Arnold on a housekeeper.....
Never did get really firm and I did look for a drop in fluid level. Honestly can't say I saw a noticeable drop though.
The only recent change is the addition of the Chevy Calipers on my front D44. Everything was working Fine with my WJ brakes. That's why I'm gonna yank the front rubber and get cozy with the front end.
I always thought a bad vacuum booster would make the pedal more firm ... like the pedal is rock hard but not doing much stopping. But I could be wrong ... never dealt with the boosters much. Can somebody explain how that works, and how it could make the pedal go to the floor?