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Fuel Injection Service FAQ

What are the benefits of a fuel injection service?

Your fuel injectors are the regulators of your gasoline. They convert the fuel into droplets that are then injected directly into the combustion chamber. It’s a relatively precise process that can be compromised over time. If you’ve ever wondered about what goes on during a fuel injection service and whether it can legitimately help your car run any better, we’ll look at the most frequently asked questions about this service.

If your injectors are clogged with any dirt, carbon, or varnish, the debris is slowing you down and increasing your average spend at the gas pump. Maintaining your fuel injection improves your engine performance and gas mileage. This preventive strategy can save you thousands in unnecessary fuel injector replacements down the line.



Cleaning fuel injection and air flow car engine Macs Radiator Fuel Injection service questions

Macs Radiator Fuel Injection Services


What’s included in the service?

We typically complete the following prep tasks for your vehicle:

  • External cleaning of injection.
  • Visual inspection of all components.
  • Coil testing for efficacy (resistance, draw, etc.).
  • Removal of excess paint or rust (if metal injector body).

Once the fuel injectors have been thoroughly prepped, we remove all outer fasteners and seals (e.g., o-rings, etc.) and any additional particles before cleaning the injectors using specialized equipment and expert hands.

Our goal is not simply to test your vehicle’s basic capacity, as your fuel injector may function perfectly in our care only to fail under pressure. We push your fuel injector to the brink, so you can be confident on the road.


What does a fuel injection service test for?

We test for leaks, spray patterns, and flow rates. The data from these procedures tell us more about how the fuel injectors interact with the engine. Ideally, injectors should be flowing at the same rate (within a few percent of each other) to ensure that you’re getting the best possible performance from your vehicle.


When should I get a fuel injection service?

Typically, it’s recommended anywhere from between 60,000 – 90,000 miles. However, depending on your driving habits, you may need an injector service sooner. Keep an eye on fuel economy and acceleration. If you find yourself filling up more than need be or if your car is slow to get off the mark, you may need to bring in your vehicle for service. Rough idling, pre-ignition hassles, and hard starting are other symptoms that the vehicle’s time has come.


How can I optimize my fuel injectors?

There are certain factors that you can’t control, such as the contaminants in the environment (e.g., water, dirt, etc.). However, there are steps you can take to get the most from your fuel injectors. Choosing high-grade gasoline (from brands you can trust), avoiding stop-and-go traffic when possible, and visiting your friendly auto service technician can all go a long way. You should also be changing your filters regularly so your engine doesn’t have to work through any major clogs.


What are the locations of Mac’s Radiator and Automotive Service?

We have five locations in Oregon (Beaverton, Bend, Eugene, Portland, Salem) and one in Boise, ID.

The staff at Mac’s Radiator and Automotive Service understands that a fuel injector service can feel like a mystery if you’re not familiar with how these components work with the engine. The bottom line is that a fuel injection service can save you money on long-term repair bills while helping your car run more efficiently. Contact us today if you want to learn more.


What kinds of cars will Mac’s Radiator and Automotive Service work with?

We work with Chevys, Fords, Hondas, Hyundais, Jeeps, Toyotas, Nissans, Volkswagens, Subarus, and Kias.



Mac's Radiator is the best mechanic to help you with all of your mechanic needs!  Let Macs help you - we are located in 6 convenient locations, for when you need us close to home, or when you're on the road.




Portland, OR      (503) 777-4706
Beaverton, OR  (503) 646-2943
Bend, OR            (541) 382-6963
Boise, ID            (208) 344-1722
Eugene, OR        (541) 344-0253
Salem, OR          (503) 364-7129

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