Hi i have range rover p38 1998 when i push on the brakes the brake wont work normally the first time but the second push it works fine it have been a long time with this problem. what are the causes for this problem??
The first thing to do in a circumstance such as this is to bleed the brakes at all 4 wheel cylinders to ensure that there is no air in the system, not to mention dirt and moisture.
You have to use a power bleeder to do the job right, which means ensuring that the brake system's existing fluid is completely replaced. Once the brakes are bled (should be done every 5 years anyway as maintenance because brakes fluid is so hygroscopic) re-check to see if the symptom has gone away.
If the problem persists, inspect/test the check valve in the brake booster to see if it is functioning properly. If that is good, then the diagnostic would move on to the master cylinder. If you would like any of these steps performed and/or your vehicle's brake system inspected consider having a certified YourMechanic professional come to your home or office to have this diagnosed and repaired.
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