How to Diagnose Common Saturn L200 Brake Booster Problems
Is stepping on the brakes starting to feel like an intense leg workout? This is probably because your brake booster is starting to fail. This is just one of the many problems you may encounter with the brake booster. It is important that you recognize such issues as they happen and find out what is causing them as soon as you can. This way, you can fix these problems before they become even more serious issues. Here are some Saturn L200 brake booster issues you should know, along with some tips on how you can diagnose them:
The brake pedal is hard and stops higher from the floor.
A brake booster makes it easy to stop your vehicle. If the brake pedal suddenly becomes too hard, you may have a problem with the entire brake booster unit; if you're lucky, though, you might just have a clogged or malfunctioning vacuum check valve. To test the brake booster, switch off the engine of your L200 and step on the brake pedal repeatedly to remove any remaining vacuum. While you have your foot on the brake pedal, start the car. The pedal should drop down a tiny distance if the brake booster is still working.
To inspect the check valve, remove the hose connected to the intake manifold. If you have a small air pump that can pump and suction air, you can use it in the next step. Try to pump some air into the line; a working check valve will make it hard to do so. Switch the pump into suction mode and try sucking the air out; you should be able to do this easily. If the check valve works perfectly, the air flow should only go in one direction, as demonstrated by the air pump.
There's some sort of air noise when the brakes are applied.
The brake boosters could have an air leak in it. To confirm this, shut off the engine of the L200 and pump the brake pedals repeatedly. If the brake booster is sealed properly, the pedal should get firmer on the second and third pump. A leaking brake booster will drop down to the same level no matter how many times you step on it. If there is no leak in the moving brake booster, you may just need to move the foam seal or the silencer of the booster to solve the problem.