'98 4 runner: delay in power brake boost application. Frequently hard to press until brakes begin to work, then all is OK. This occurs about 50% of the time. Will always occur when car is first started. Check valve appears to be OK.
Little over 100k mikes. Disks and rotors are not very. Old 5 to 7,000 m. Brake fluid is not low.
This problem suddenly appeared.
Sunday, December 12th, 2010 AT 6:55 PM