1979 Chevy El Camino proportioning valve

1979 CHEVROLET EL CAMINO
83,000 MILES • V8 • 2WD • AUTOMATIC
Avatar
ELCAM1979
  • MEMBER
  • 2 POSTS
Front brakes don't work very well. Rear brakes are fine. New calipers,new hoses,new pads, new master cylinder,new rear shoes,springs and hoses,flushed lines with new fluid twice. removed proportioning valve for cleaning , flushed each steel line, no vacuum leak, seems as though booster is working. When backing on loose gravel front brakes will not lock-up. On normal stop rear brakes seem to do all the stopping, as car does not dive downward on hard braking, car stays level. Is there a way to check these proportioning valves?????
Apr 26, 2009 at 7:57 PM
Advertisement
Avatar
HMAC300
  • ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
your first mistake was taking the proportioning valve apart to clean it. That is a part that doens' tgo bad very often at all. I would take it back apart again and make sure it is together correctly. Or change it to a known good one alltogether. Then rebleed your system starting at the back right rear-left rear-right front-left front. My bet is you still have air in the system someplace. Apower brake bleeder would be your best bet.
Oct 6, 2009 at 1:55 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.