abs problems
Elder User
Joined: Aug 2005
Posts: 566
Likes: 3
From: New Jersey
Ok, now I'm confused. I pulled the driver's side rear drum off today - had to replace the hub seal and some lug studs (wasn't too bad). But I checked out my wheel cylinder and it's working perfectly. I had someone press the brake pedal, both pistons extended out and then retracted on their own when he released the brake pedal.
This wheel hangs up, though, after I drive about 10 miles. The passenger side brake has no problems at all. I don't seem to have the electronic proportioning valve. I just have a T-connection on the rear axle that goes to each wheel cylinder. Does anyone have any ideas about what would cause that wheel to hang up when it's warm (presuming temperature is the causal factor), but work perfectly fine when it's cold?
I should reiterate that when it's acting up, my pedal gets harder and the brake/abs lights both come on. I replaced the brake booster (due to an unrelated failure) and checked the vacuum pump, which pulls 21 inches of vacuum at all times.
I'm getting flustered.
This wheel hangs up, though, after I drive about 10 miles. The passenger side brake has no problems at all. I don't seem to have the electronic proportioning valve. I just have a T-connection on the rear axle that goes to each wheel cylinder. Does anyone have any ideas about what would cause that wheel to hang up when it's warm (presuming temperature is the causal factor), but work perfectly fine when it's cold?
I should reiterate that when it's acting up, my pedal gets harder and the brake/abs lights both come on. I replaced the brake booster (due to an unrelated failure) and checked the vacuum pump, which pulls 21 inches of vacuum at all times.
I'm getting flustered.
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Freshman User
Joined: Dec 2004
Posts: 49
Likes: 0
electronic proportioning valve is upfront bolted to the frame below the master cylinder. follow your lines. You will see 3 studs on the driver side between the tire and frame. very imple to change.mine was doing the same thing when it got hot. I haven't had a problem since changing.
Elder User
Joined: Aug 2005
Posts: 566
Likes: 3
From: New Jersey
Problem Solved!
pbarw,
Found that valve right where you said it would be. I took it apart and it was all gunked up and had some mild corrosion inside. I cleaned it all out and took emory cloth to the corroded parts, which in all took about 30 to 45 minutes, reassembled it and took it for a good long ride. Problem solved! I tried to get the brakes to lock up, and my right rear wheel did lock up a couple of times, but that's a separate problem with the rear brake adjuster being gunked up and not working properly. The one time I found a wet spot in the road and hit the brakes hard, they locked up for a split second and then released, so I think the ABS is actually working.
My brake fluid was looking pretty bad, so I vacuumed out as much as I could and replaced it with fresh new fluid. I have to purge the whole system, though, but I just didn't feel up to it today. It's too nice out, especially after all the rain we got up here in the northeast. Thankfully, I'm on the southern end of the northeast region.
I can describe the internals of the valve if anyone else wants the information. It's really not bad to disassemble and clean it.
Found that valve right where you said it would be. I took it apart and it was all gunked up and had some mild corrosion inside. I cleaned it all out and took emory cloth to the corroded parts, which in all took about 30 to 45 minutes, reassembled it and took it for a good long ride. Problem solved! I tried to get the brakes to lock up, and my right rear wheel did lock up a couple of times, but that's a separate problem with the rear brake adjuster being gunked up and not working properly. The one time I found a wet spot in the road and hit the brakes hard, they locked up for a split second and then released, so I think the ABS is actually working.
My brake fluid was looking pretty bad, so I vacuumed out as much as I could and replaced it with fresh new fluid. I have to purge the whole system, though, but I just didn't feel up to it today. It's too nice out, especially after all the rain we got up here in the northeast. Thankfully, I'm on the southern end of the northeast region.
I can describe the internals of the valve if anyone else wants the information. It's really not bad to disassemble and clean it.
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