5 COMMON CAUSES OF BMW X 3 VACUUM LEAKS IN TOLLESON
Vacuum leak is a leak found anywhere between the engine and a mass airflow sensor.
Moreover, it will cause unmetered air to enter the system in your BMW X3.
This causes the actual airflow to be higher than the mass airflow sensor measures.
As a result, the PCM miscalculates the amount of the injected fuel and runs the engine lean.
The following points define the common causes of a vacuum leak in the BMW X3.
BRITTLE VACUUM HOSES AND LINES
Hoses and lines that connect the PCV system to the intake manifold are prone to failures.
Crankcase vapors contain oil may damages the rubber and make the hoses and lines swell and crack.
LEAKED BRAKE BOOSTER
A brake booster is installed between the brake pedal and the brake master cylinder.
Brake booster has a vacuum diaphragm. When the booster leaks, it creates a vacuum leak.
RIPPED INTAKE SNORKEL
Rubber or plastic snorkel are connecting the engine intake and the air filter box in the vehicle.
If an intake snorkel is not installed properly at a throttle body, it can cause a vacuum leak.
CRACKED PCV SYSTEM
PCV system collects oil from vapors using an oil separator and flows it into the engine intake through the PCV valve.
When the rubber parts of the PCV system are cracked, then it will create vacuum leaks.
WARPED INTAKE MANIFOLDS AND GASKETS
In general, the intake manifold is bolted to the engine head or plenum of the BMW X3.
With age, the plastic intake manifolds warped and causes vacuum leaks.
CONCLUSION
Moreover, diagnosing the vacuum leaks in your BMW X3 is not always easy.
Consult with a reputed mechanic for determining the vacuum leaks and fix the issues.
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