1st. You have replaced all Calipers and the Master Cylinder is this correct?
2nd If the Master is replaced you need to “bench bleed it”. Blowing out the lines is usually a bad idea. When I did mine (all calipers new, lines new and master) we replaced all the fluid with redline synthetic. We opened the rear bleeders and let gravity drain the old fluid and pour in new as it depletes. Then the fronts the same way, just keep the reservoir topped off.
Once all lines were full we went through the process of bleeding any residual air that was left in the system. This takes 2-3 people to do manually. They have bleeder kits with a vacuum gun and waste cup but why spend the money if you don’t have to.
One of the keys is to not pump the hell out of the pedal, if there is air in the system it will foam the fluid and make it harder to bleed. Start at the furthest caliper from the master and work closer. Slowly pump it 3 times and hold it, crack the bleeder but don’t let the pedal go all the way to the floor. Wait about 15 seconds and repeat. Keep repeating until you are satisfied there isn’t any more air in the system, it took us about 15 min. each wheel. Keep checking the reservoir and don’t let it drain all the way down. Go to each wheel and repeat. We had the car on stands and all wheels off when we did it. It is easier to go back to a wheel if you aren’t satisfied of the results. You don’t need the car to be running it really doesn’t matter.
If you take you time it helps. I haven’t had any problems with mine since we did this in August.
