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Schnitz Racing: Fuel Injector Cleaning

Fuel Injector Cleaning

Schnitz Racing is excited to announce our fuel injector cleaning and flow testing service.  Our new GB-800 Machine allows us to carry out a variety of testing procedures to fully inspect and document your injectors.  Static and multiple dynamic flow rates are taken on the injectors before and after cleaning in our heated ultrasonic bath.

Fuel injectors are often overlooked when preventative maintenance needs to be performed. We all change oil, tires, chains, sprocket and spark plugs – but we rarely think about our fuel injectors unless a major problem occurs.

Schnitz Racing Fuel Injector Cleaning

Hard Starting, Rough Idle, Sooty Exhaust, Lack of Performance and Poor Part Throttle Acceleration are all symptoms of dirty injectors.

Oxygen additives in racing fuel like MTBE can cause injectors to quickly build up tarnish and a sticky film on the pintle and diffuser plates. The same can be said for pump gasoline with 10-15% Ethanol when engines are ran hard. The heat from the engine can cause the fuel to quickly evaporate and leave a film on the injector tips

Fuel additives may work for some applications to clean some parts of the injector (if one remembers to add it to the tank), but how do you know if they really work if you can’t see or test the results on every injector?


  • Each injector is numbered for reference
  • Coil Resistance Test
  • Leak Test to see if the injector seat or spring is dirty or weak
  • Spray Pattern Testing by visual inspection checking for dirty or blocked diffuser plate or pintel
  • Dynamic Flow Testing rates are documented at multiple RPM’s and sweeps.
  • Static Flow Testing is documented
  • Heated Ultra-Sonic Cleaning to remove varnish and carbon
  • Backflush to remove cleaning solution and any debris from inside the injector
  • All above testing is performed again
  • O-rings and Filters are replaced as needed
  • Injectors are packaged and shipped with documentation and lube for O-Rings.


If Schnitz Racing doesn’t have it, they don’t make it.

Schnitz Racing
222 N 3rd Street • Decatur, IN 46733
Phone: (260) 728-9457

Schnitz Racing 2023

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