How do I clean the injector screen? - Culligan Sediment Water Filter

Cleaning injectors is a process best left to a professional with a bench setup to properly flow and clean them. In a pinch for a low cost short term fix you can do the following:

1. Remove the + battery terminal.
2. Remove the fuel rail retaining bolts and the injectors will pull out of their seat in the head.
3. Remove the injector plug and simply pull them out. Look into the input side and you should be able to see if it is relatively clean. Sometimes they are completely clogged on older vehicles.
4. Use Seafoam injector cleaner and spray into the input while pulsing the nozzle in and out until it is clear. Also spray some into the nozzle end.
5. Repeat for all injectors, let them sit for an hour to 24 hours, then repeat the cleaning with the injector cleaner to force out any residual.
6. You can also energize the relay with 12V and spray through the nozzle, but this is difficult without having a pressurized system.
7. Reinstall (preferably with new O-rings) and enjoy.

I did this recently on my son's 1999 Mitsubishi Mirage due to 2 cylinders not firing at all and it runs like a champ. Cost me $10.99 from Autozone. You should also replace the fuel filter at this time.