These direct replacement high-low 750cc Motorsport Injectors are suitable for replacing the standard port injectors for power outputs over 300bhp. Included in the package are… 

• 4x 750cc high flow fuel injectors

• 4x wiring harness adapters

• 4x New lower seals

• Fitting Instructions and Tuning Tips

Once you have installed the high-flow injectors it will be necessary to calibrate the ECU with the correct settings ofInjector Flow Scaling, Injector Lag Time Offset and the cranking fuel tables in EcuTek ProECU software before you start the engine.

The job of installing the new injectors and recalibrating the system should take approximately one hour to complete. 

1. Disconnect the battery negative terminal
   
   
   

2. Remove the two injector covers which are retained by two M8 thread (12mm head) bolts on each side.
   
   
   

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3. The direct injector control unit must be separated from one of the covers before attempting to remove it. This is retained by 3x M6 (10mm headed) bolts.
   
   
   

4. Gently position the control unit to one side then remove the metal cover (2x M8 bolts).
   
   

   
   
   
   

5. You will now be able to see the port injectors and fuel rails; disconnect the electrical connectors from the injectors, loosen the vehicle fuel-filler cap to release fuel tank pressure, and remove bolts 1 and 2, which are shown below. 
   
   

   
   
   
   
   

6. Gently pull the fuel rail away from the inlet manifold, remove the lower rubber seals from the manifold openings (new seals are supplied with the kit) and remove each injector by pulling them clear of the fuel rail. Ensure the upper seals stay on the injectors when they are removed from the fuel rail.

1. Remove the two protective silicone caps from each of the EcuTek injectors. Lubricate the upper and lower seals sparingly with petroleum jelly or clean fuel, then carefully push the injectors, firstly into the fuel rail, then into the inlet manifold openings, ensuring the lower seals locate correctly.
   
   
   

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2. Fit the EcuTek injector wiring adaptors between the new injectors and original injector wiring. The remainder of refitting is as per removal instructions, though in reverse order. Be careful not to trap any wiring when refitting the metal covers, ensure all bolts are correctly secured, and re-tighten the vehicle fuel-filler cap.
   
   

   
   
   
   

3. After physical installation of the new EcuTek fuel injectors you need to modify some settings in the ROM file, using ProECU.