2019 INFINITI Q70 Has A Vacuum Leak

Diagnosing Vacuum Leaks in Your 2019 INFINITI Q70: Symptoms, Causes, and Repair Solutions

Find Repair Location
Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Leaking Vacuum Hoses
0%
30% chance it's the
Leaking Gaskets and Seals
0%
20% chance it's the
Bad Actuators and Valves
0%
10% chance it's
Something else
The most common reasons a 2019 INFINITI Q70 has a vacuum leak are leaking vacuum hoses, leaking gaskets and seals, or bad actuators and valves.
  • Leaking Vacuum Hoses: A cracked or disconnected vacuum hose can lead to a loss of engine vacuum, resulting in poor engine performance and increased fuel consumption.
  • Leaking Gaskets and Seals: Aged or damaged gaskets and seals can lead to fluid leaks, resulting in loss of engine oil or coolant and potential engine damage.
  • Bad Actuators and Valves: A malfunctioning actuator or valve can disrupt the proper operation of the vehicle's systems, leading to issues such as poor engine performance or erratic behavior of components like the HVAC system.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2019 INFINITI Q70 has a vacuum leak?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Problems with the intake manifold gasket can create the following symptoms:

  • Illuminated check engine light
  • Erratic engine performance
  • Oil and coolant leaks
  • Poor gas mileage
  • Stalling

» LEARN MORE: Intake manifold gasket symptoms

Rough idling, lack of power, engine oil leaks, engine burning oil, and illumination of the check engine light are all possible if the PCV valve has clogged. If the check engine light comes on, the on-board diagnostics (OBD) trouble codes will most likely relate to manifold vacuum, air and fuel mixture, PCV system, mass airflow sensor readings, and exhaust and emissions readings. These are all affected in the event the PCV valve is clogged, is stuck fully open, or is stuck fully closed, however, if the valve is stuck fully open, the engine oil seals are not in danger of overpressure.

A bad valve cover gasket will result in an oil leak. You may notice oil under the car or on other parts under the hood. You might also notice a burning smell while driving.

» LEARN MORE: Signs of a bad valve cover gasket

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

What are the steps to diagnose a vacuum leak in a 2019 INFINITI Q70?

To effectively diagnose a vacuum leak in your 2019 INFINITI Q70, start with a thorough visual inspection of the engine bay. Look for any damaged or disconnected vacuum hoses, paying close attention to cracks, holes, or loose connections that could be causing the leak. Next, start the engine and listen for any hissing noises, as these sounds can help you identify the location of the leak. If you suspect a vacuum leak, using a vacuum gauge can provide valuable insights; connect it to the intake manifold and check the reading at idle—lower than normal readings often indicate a leak. For a more hands-on approach, spray soapy water on the vacuum hoses and connections while the engine is running; if bubbles form, you’ve found the source of the leak. If these methods do not yield results, consider performing a smoke test, which involves introducing smoke into the intake system to visually identify leaks. Finally, if you’re still unable to locate the leak, utilizing professional diagnostic tools may be necessary to pinpoint the issue accurately. By following this structured approach, you can systematically diagnose and address any vacuum leaks in your vehicle.

What are the common problems associated with vacuum leaks in a 2019 INFINITI Q70?

When it comes to vacuum leaks in a 2019 INFINITI Q70, several common problems can significantly impact the vehicle's performance. One of the most noticeable symptoms is rough idling, where the engine runs inconsistently while at a standstill, leading to an uncomfortable driving experience. Additionally, vacuum leaks can disrupt the air-fuel mixture, resulting in decreased fuel efficiency and potentially higher fuel consumption, which can strain your budget over time. If you notice the check engine light illuminating on your dashboard, it may be a direct result of a vacuum leak, signaling that immediate attention is required. Furthermore, drivers may experience a loss of power during acceleration, making the vehicle feel sluggish and less responsive. Lastly, keep an ear out for any hissing or whistling noises coming from under the hood, as these sounds can indicate the presence of a leak in the vacuum system. Addressing these issues promptly is crucial to prevent further damage to the engine and to maintain the optimal performance of your INFINITI Q70.

How urgent is it to repair a vacuum leak in a 2019 INFINITI Q70?

Repairing a vacuum leak in a 2019 INFINITI Q70 is an urgent matter that should not be overlooked. The presence of a vacuum leak can significantly impair engine performance, leading to symptoms such as rough idling, stalling, and misfiring, which can compromise the driving experience. Additionally, a vacuum leak can cause the engine to run lean, resulting in decreased fuel efficiency and increased fuel consumption, ultimately affecting your wallet. Beyond performance and efficiency, neglecting this issue can have serious environmental repercussions, as it may lead to higher emissions that violate regulatory standards. Furthermore, the longer a vacuum leak is left unaddressed, the greater the risk of causing damage to other engine components, which can escalate repair costs. Safety is another critical concern; a vacuum leak can impact the braking system and other vital functions, posing a risk to both the driver and passengers. Therefore, it is essential to prioritize the repair of a vacuum leak to ensure the optimal performance, efficiency, and safety of your INFINITI Q70.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.