924S Posted May 10, 2012 Share Posted May 10, 2012 This may make more sense that my past tries: 1. Is it possible to disable the ABS and still have brakes? If so, how? 2. What would cause all 4 wheels to lock up in about 2 miles? -- all hydraulic rubber lines are new -- new MC (2x - thought new one was bad) -- power booster, pedal & brake switch checked by a local certified mechanic Back ground: I bought the car with a demonstrably failing MC; installed rebuilt MC and drove home just fine, about 80 miles. A few days later, the rear brakes started locking up after several stops; cracking open the rear line released the brakes. We replaced the rubber brake lines (4). A few days later, it started again. Mechanic tested the system and replaced the "new" MC and the car did fine for a few weeks. Then it started locking all 4 corners. It does't always free up overnite, but a wrench on both brake lines will always work. The wierd thing is that if I do not use the brake at all, except to put it in drive, about 2 miles or less of driving will lock them up. Our mechanic says he's over his head; he has run the troubleshooting prosses from ALL Data and cunsulted other sources and could only tell me the problem in in the ABS system - for whcih had no resources. We are about 50mi from the nearest Lexus dealer if I were willing to pay their rates... A possible piece of the puzzle: when we were replacing the brake line, we encountered a hose that was simply lying on the caleper in a ring - not attached to anything. I'm thinking it is the speed sensor, but it lookeds incompleat. Quote Link to comment Share on other sites More sharing options...
924S Posted May 10, 2012 Author Share Posted May 10, 2012 Ooops!! Forgot critical info: 1994 LS400 Fairly basic: no Trac,no air suspentionl Quote Link to comment Share on other sites More sharing options...
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