INFINITI FX35 Has A Vacuum Leak

Diagnosing Vacuum Leaks in Your INFINITI FX35: Symptoms, Causes, and Repair Solutions

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Reviewed by
Bo Fader
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 INFINITI FX35 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 INFINITI FX35 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.

Troubleshooting Vacuum Leaks in an INFINITI FX35

When troubleshooting vacuum leaks in your INFINITI FX35, begin by inspecting the most visible and accessible components, such as the vacuum hoses. Look for any signs of wear, such as cracks or disconnections, particularly in the intake hose, as these are common culprits for leaks. Next, examine the gaskets and seals around the engine, as deterioration in these areas can also lead to air leaks that disrupt the air-fuel mixture. If the initial checks do not reveal any issues, proceed to assess the functionality of the actuators and valves within the vacuum system, as malfunctioning components can contribute to performance problems. Additionally, if your vehicle's diagnostic system indicates a GROSS leak in the evaporative system, pay special attention to the gas cap and the EVAP canister vent control valve, as these are often overlooked yet critical areas. By methodically working through these steps, you can effectively identify and resolve vacuum leaks, ensuring your engine runs smoothly and efficiently.

How to Diagnose and Fix a Vacuum Leak in an INFINITI FX35?

When tackling the issue of a vacuum leak in your INFINITI FX35, it's essential to understand the common problems that can arise within the vacuum system. A vacuum leak can lead to a variety of performance issues, including rough idling, decreased fuel efficiency, and increased emissions. Common culprits include cracked or worn vacuum hoses, faulty gaskets, and damaged seals. These components can deteriorate over time due to exposure to heat and engine vibrations, leading to air leaks that disrupt the engine's air-fuel mixture. Additionally, less frequent issues such as a malfunctioning intake manifold or a defective brake booster can also contribute to vacuum leaks. By being aware of these potential failure modes, you can more effectively diagnose the source of the problem and take the necessary steps to repair it, ensuring your vehicle runs smoothly and efficiently.

Why is Addressing a Vacuum Leak Urgent in an INFINITI FX35?

Addressing a vacuum leak in your INFINITI FX35 is not just a matter of routine maintenance; it is an urgent necessity that can significantly impact your vehicle's performance and safety. When a vacuum leak occurs, it allows unmetered air to enter the engine, disrupting the delicate balance of air and fuel required for optimal combustion. This imbalance can lead to a range of performance issues, including rough idling, decreased fuel efficiency, and even engine stalling. Moreover, if left unchecked, these symptoms can escalate into more severe engine problems, potentially resulting in costly repairs. Regularly inspecting your vehicle's air intake components can help you identify and rectify leaks early, ensuring that your INFINITI FX35 runs smoothly and efficiently. Ignoring these signs not only jeopardizes your vehicle's performance but also poses safety risks on the road, making it imperative to address any vacuum leaks as soon as they are detected.

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