Everything You Need to Know About Car Vacuum Leaks

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Your BMW, Mercedes, Porsche, or other European machine uses vacuum pressure for engine combustion and power. If there is a leak in one or more of the vacuum hoses, or lines if you prefer to call them that, you will notice performance issues that need to be addressed as soon as possible by 610AutoHaus. The longer you wait to fix the car vacuum leak the more engine damage you’ll incur.

Signs of an Engine Vacuum Leak

Signs of a vacuum leak can be deceiving, which is why it’s important to get a professional diagnosis of your vehicle’s problem. A vacuum leak can mimic an ignition or fuel system problem. Your check engine light might come on because of the vacuum pressure loss, but the check engine will also come on if there’s transmission trouble. Aside from the check engine light, signs of a vacuum leak include

  • Higher RPMs as excess air cycles through your engine
  • Rough idling that makes it feel as if your vehicle will stall
  • Sporadic engine power that surges and lags with pressure changes
  • Difficulty starting your car because of too much air
  • Stalling because there is not enough fuel mixed with the air
  • Loud noises that sound like hissing or squealing

The last sign is one of the most revealing. If you’ve been having engine performance issues, park your car in the driveway with the parking brake set and turn on the engine. Pop the hood and listen closely. You might hear the vacuum pressure spurting out of the leaking hoses and, as we said above, it will sound like hissing or squealing. This coupled with another sign can definitely point to a vacuum leak.

Dangers of Ignoring Vacuum Leaks

It’s better to get the vacuum leak fixed right away – the minute you suspect there’s something wrong. Putting off the repair not only makes the leak worse, but it also damages your European automobile’s engine. As the vacuum pressure spurts out of the leaking hoses, it can overheat the engine, disable the engine systems it powers, and even create a damaging compression and timing issue.

Things that cause vacuum leaks are holes in the hoses; hose disconnection; problems with the actuators, regulators, solenoids, and valves; vacuum gaskets and seals; issues with the brake booster if your vehicle has one. The brake booster is an example of a part that the engine vacuum powers, so bring your vehicle into 610AutoHaus in Pottstown, PA, for a vacuum system inspection if you suspect you have a leak.

Call 610AutoHaus at 610-427-4505 for an appointment today!

Image by Davgood Kirshot from Pixabay