How to Clean Bosch Fuel Injectors

Written by jim skelter
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How to Clean Bosch Fuel Injectors
Bosch was founded in Stuttgart, Germany in the late 19th Century. (auto, detailed, tailpipe image by Rina from

Robert Bosch Auto Parts GmbH is one of the world's largest auto parts suppliers. Based in Germany, the GmbH is a German acronym that stands for a "company with limited liability." Bosch fuel injectors are very common in most automobiles, and when dirty, they can become clogged, contributing to a host of engine problems. Cleaning fuel injectors can be a heavy duty endeavour and you shouldn't hesitate to leave it to a mechanic, but you can clean them yourself if you are so inclined.

Skill level:

Things you need

  • Fuel injector cleaning kit

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  1. 1

    Locate the fuel injectors. Some fuel injectors are more easily accessible in some automobiles than others, so you may need a guide or manual to locate the Bosch fuel injectors in your particular vehicle.

  2. 2

    Remove the fuel pump to stop up the fuel return. Disconnect your pressure regulator and remove the fuel cap from your gas tank.

  3. 3

    Turn the ignition to be sure that the engine won't turn over with the fuel pump off.

  4. 4

    Open the valve on the kit continuously until the pressure reading matches the one for your vehicle.

  5. 5

    Run the cleaning solvent by starting the engine. Let the engine run until the solvent has passed through injectors, about five minutes. The engine will shut down.

  6. 6

    Replace the gas cap, pressure regulator and fuel pump.

Tips and warnings

  • Wear eye protection around solvents.
  • Do not smoke or keep any open flame around solvent.

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