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Mercedes-Benz of Stevens Creek

Mercedes-Benz Sprinter Fuel Injector Problems - How To Troubleshoot and Fix

Your Mercedes-Benz Sprinter's fuel injector is responsible for feeding fuel to your engine using a series of nozzles controlled by your vehicle's computer. Fuel is sprayed by the fuel injectors as a fine mist, at regular intervals, and in different patterns based on driving behaviors. Here, gas mixes with air until it ignites to achieve an optimal air-to-fuel ratio. A disruption to fuel injector performance can cause your engine to wear and tear prematurely and eventually lose power and acceleration ability.

Typically, you should inspect Mercedes-Benz Sprinter fuel injectors every 100,000 miles. However, they could degrade prematurely, so you may need to repair, clean, or replace them as needed.

Keep reading to learn more about the signs of a bad injector, common problems, Mercedes-Benz Sprinter injector leaking, and solutions to those problems.

Where Is The Mercedes-Benz Sprinter's Injector Located?

Your Mercedes-Benz Sprinter's fuel injectors are located by your engine's intake manifold near the intake valve, sitting closer to your dashboard. It connects to a fuel rail that feeds injectors with fuel.

What Are Signs of a Bad Mercedes-Benz Sprinter Fuel Injectors?

Loss of Acceleration Power

Sometimes, defective Mercedes-Benz Sprinter fuel injectors disrupt your air to fuel ratio, which results in a loss of power and fuel economy. In some cases, the engine can come to a complete stop. Conversely, defective fuel injectors can also cause engine stuttering, followed by acceleration and struggle to gain speed. Be especially attentive to a slight delay when pressing your gas pedal.

Check Engine Light

Your Mercedes-Benz Sprinter's check engine light may illuminate if your fuel injectors are compromised. However, your check engine light turning on is not the end-all, be-all. Because hundreds of faults can trigger your check engine light, it is best to scan for trouble codes using an OBD scanner to identify the source of the issue. You can do this without the help of a mechanic.

Bad Fuel Smell

If you notice an overwhelming fuel smell emanating from your Mercedes-Benz Sprinter's underhood, this could be due to a nozzle leak or broken injector top seal. Injectors can leak fuel at the base or fall into the combustion chamber, resulting in stalling and loss of power. If you disregard leaking fuel and vapors, this could result in an engine fire, causing extensive damage to your entire vehicle.

How Do I Clean a Clogged Fuel Injector?

Troubleshooting, diagnosing, and cleaning a clogged Mercedes-Benz Sprinter fuel injector is a relatively straightforward process that you can perform on your own. You will need a fuel injector cleaning kit, which you can purchase from the Mercedes-Benz national store for this task.

Here are the steps needed to clean a fuel injector:

  1. Remove the fuel injectors by disconnecting your fuel pump and pressure regulator vacuum line.
  2. Remove your fuel tank cap.
  3. Follow your fuel injector kit's instructions, including starting your vehicle to inject cleaning fluid into the injectors, a process that usually takes no more than 15 to 20 minutes.
  4. Reassemble your fuel pump and put the fuel cap back in its place

Turn on your vehicle and perform a 5 to 10-minute test drive. Watch out for any strange noises, stalling, loss of acceleration, or engine misfiring. If a cleaning does not fix your injector, it may be time to replace it with an OEM Mercedes-Benz fuel injector.

All in all, your Mercedes-Benz Sprinter's fuel injectors are an integral part of your vehicle's operation, allowing it to effectively deliver the correct amount of fuel to keep your engine running without any loss in power. Any clogging with debris or a corroding gas tank could cause long term damage to your fuel injectors.