DIY DIESEL INJECTOR SERVICE

Liqui-Moly Diesel Purge Plus is a highly efficient fuel injection cleaner for diesel engines. When used properly, it is far more effective than simply adding it to the fuel tank. Below we will outline how to use the product to ensure immediate and effective results.

The objective is to remove the fuel feed & fuel return hoses and insert them into the can of Diesel Purge Plus. After that, the car is started and runs off the can until empty. From start to finish, the process should take approximately 30 minutes, including run time.

NOTE: This service was carried out on a 60 series Toyota Landcruiser, steps and procedure may vary for different make/model vehicles. If the process is too challenging, your local diesel specialist can assist, or for further information please call us on 1800 350 622.

CHECKLIST – PRODUCTS:
– Liqui-Moly Diesel Purge Plus
– Liqui-Moly Brake & Parts Cleaner
– Liqui-Moly Diesel Anti-Knock

CHECKLIST – TOOLS:
– Socket or spanner set
– Pliers
– Flat head screw driver
– 6mm or 10mm Clear hose (for plumbing – depending on existing hose sizes)
– 6mm Clear hose (for bleeding)
– Plastic bottle (for bleeding)
– Rags
– Rubber/latex gloves (Optional)

STEP 1: Pop the bonnet of the car, and locate the fuel filter.

STEP 2: Locate the fuel feed hose that runs from the fuel filter to the fuel pump. Either the fuel filter housing or the fuel hose itself will have an arrow marked on it to show the fuel flow direction. In the above pic there is an arrow on the fuel filter that points in the direction of the fuel pump, this is the hose that you want to remove from the fuel filter. Loosen off the hose clamp on this hose and disconnect it from the fuel filter.

Tech tip: Have a rag ready to mop up any spills.

STEP 3: Locate the fuel return hose that runs from the fuel pump to the fuel tank. This is a soft hose that usually meets a hard fuel line running to the fuel tank. Disconnect soft hose at the join where it meets the hard line. If the soft return hose isn’t long enough to reach the can of Diesel Purge Plus you will need to use a piece of 6mm or 10mm clear hose (depending on the size of your existing hoses) to extend its length so that it comfortably reaches the can of Diesel Purge Plus.

STEP 4. Open the can of Diesel Purge Plus and place the two lines into the can. Be sure to put the can in a safe spot on the engine where it will not tip over. If you can have a helper hold the can, at least initially, that is ideal.

Tech tip: Ensure that the lines are at the bottom of the can, where they will not suck air in as the can empties.

STEP 5: Start the engine and let it idle for a few minutes. After that run the engine through various RPM’s until the can is empty and the engine stalls.

STEP 6: Carefully pull the hoses out of the can. Take caution, the can and remaining fluid could be hot.

STEP 7: Refit all hoses in the same order as you disconnected them. At this point you could choose to replace your fuel filter however this is optional.

Tech tip: Use some Liqui-Moly Brake & Parts Cleaner to clean fuel residue from any spills.

STEP 8: Now the fuel system needs to be bled, locate the hand priming pump, this will be attached to the fuel pump.

STEP 9: Prime the fuel system by hand to remove any air, this will require you to locate the bleeder nipple and open it to release all of the air in the system. A hose and bottle is the best way to avoid making a mess and to catch any fuel.

STEP 10: Repeat the bleeding process until all air is removed from the fuel system.

STEP 11: Start the engine and let it idle a while and then check for any leaks from the hoses. When you are satisfied that there are no leaks, go for a drive. You will notice that the engine is quieter, there is less smoke, and you may even notice more power.

STEP 12: For continued smooth running add Liqui-Moly Diesel Clean & Boost to every tank.

STEP 13. You’re done!

NOTE: This service was carried out on a 60 series Toyota Landcruiser, steps and procedure may vary for different make/model vehicles. If the process is too challenging, your local diesel specialist can assist, or for further information please call us on 1800 350 622.

Thanks to Sam at S.A CALI 4WD SPECIALISTS for the use of the car and their workshop.