1994 Buick LeSabre Q&A

1994 Buick LeSabre Question: Where is the proportioner valves on this vehicle?

I am having diagonal right front and left rear brake failure. I was told that it could be a proportioner valve failure problem. -
Answer 1
That valve can fail but its very rare. It is typically located below master cylinder mounted on chassy frame. -
Comment 1
Thank you. I did find where the valves are located on my vehicle. -
Answer 2
Define brake failure on right front and left rear. No brakes on those two? Brakes locking up? It's not the porp. valve! -
Comment 1
Yes,no brakes on left rear and right front. Did have a bad caliper on right front. Replaced and still no brakes. Left front and right rear fine. I don't know. -
Comment 2
Poor/low brake pedal? -
Comment 3
Yes, brake pedal low and sound like air flowing through when pedal compressed. Had good brake pressure and then lost again. Could it be booster? -
Comment 4
No! Booster can NOT cause LOW pedal. Seek a mechanic's hands on help. It is time for that! -
Comment 5
ok. Was leaning towards that. I've did all I can do on my own. Thanks. -
Comment 6
Smart move! Hope you get it back on the road. Cant play around much with the brakes! -
Comment 7
Your right about that. Thanks for your help. I'll stick to things I can do. -