Fix My Lamborghini
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BRAKES ACTING STRANGE

Problem - When starting the car cold, it takes 45 seconds for the brakes to work. The brakes have nothing at all. After 45 seconds, the brakes work. When backing out, I have to almost stand on the brakes to get them to stop.

Possibility 1 - It sounds like a pinched vacuum line going to the brake booster or it could be a bad check valve.

Possibility 2 - ​After the car is warmed up and everything is fine, pull over and shut the engine off. Hit the brakes 5 times until the pedal gets very stiff again. Start the car and quickly test the brakes again. The pedal should be soft less than 1 second of the engine restarting. That will eliminate if it is a cold start problem. Try coasting down a quiet road and apply the brakes quickly and lightly several times to see if the pedal pressure remains consistent. If the pedal becomes unacceptably firm, it might be a vacuum supply problem to the booster. If all seems well when the car is warmed up, I would be looking at the check valve. I have heard of them sticking shut when cold on other cars.

Possibility 3 - Take it to a mechanic and get this seen to. It could be the start of your brakes failing while you are driving. Even better, get the car towed to the mechanic.
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  • Urus
  • Huracan
  • Aventador
  • Gallardo
  • Murcielago
  • Diablo
  • LM002
  • Jalpa/Silh.
  • Countach
  • URRACO
  • JARAMA
  • ISLERO
  • Espada
  • MIURA
  • 350 400 GT