Hi Scotty, I've been having a problem with my mother's 2004 lexus RX330 AWD. After I bleed the brakes,(even using scan tool) I start the car and the brakes go all the way to the floor, no brakes at all! Ive replaced the master cylinder, booster, ABS unit, all calipers and brake pads. There's no leaks, I get a good firm pedal...until the car is started. Please help I've been going in circles with this car for 2 weeks now. Thank you.
Well if you did all the work yourself you should pay mechanic like me to believe the brakes. You can't bleed the brakes on one of those without a special computer to activate all the solenoids in the ABS system. Because normally if it's hard fine when it's cold but since when you start it up that's a signal of a bad booster. But you said you sent the booster. The only thing that would really do that would be air in the system or an ABS module failure
