Contour Enthusiasts Group Archives Forums General Troubleshooting Brake question

Recently my cars braking performance has seemed weak. I've got 4 wheel disk abs brakes, and its work to activate the abs. My pads and rotors are fine, and w/disk brakes there are no adjustments one can make. Yesterday I put in a new master, and it seems a little better, but still not perfect. I was wondering if any of you have had to put in boosters for similar problems?

thanks,
scott

Change the brake fluid and make sure there isn't any air in the system! Brake fluid when watered down makes the pedal real spoungy.

-Andy

I concur with the previous post. A complete flush should take care of the problem. A great 2 person job on a lazy Saturday afternoon.

However, be sure to drain in the proper sequence (from the longest distance back to the master cylinder) one wheel at a time. RR, LR, RF, LF. ONLY close the brake caliper bleed valves after fluid comes out clear w/o ANY signs of air or bubbling.

Also be sure to use a good fluid, with a Castrol GT/LMA being a minimum, not the "$1.99 special sale stuff". Much better than stock.

I'm required to use Wilwood Hi-Temp (570 boiling point) fluid since I use Wilwood 4-piston calipers up front. Great stuff.

On a final note, be sure to do a complete flush at least every couple of years on a street car and whenever doing brake work. Your wallet will thank you later down the road as ABS distribution blocks are VERY expensive and usually only bite the dust due to neglected/contaminated brake fluid.

check the vacuum line going to the power booster, that round can thing between the firewall and the master cylinder. It is powered by vacuum from the engine and if there is a leak in the line it will hinder performance of the booster.