Fuel Injectors Cleaning - DIY Folks,
Cleaned fuel injectors first time in 52000 kms in Maruti Versa as under(two people are required): - Allow engine to cool for 30 minutes(just to ensue that when you open fuel rail,the petrol spill on the engine surface should not cause a surprise)
- Disconnect battery -ve
- Loosen fuel Tank filler cap to relieve pressure
- Disconnect fuel supply,return and vapour filter hoses on fuel rail
- Disconnect wiring sockets to all injectors
- Remove two bolts connecting fuel rail to engine top
- Carefully remove rail with injectors
- Mark injectors as 1,2,3,4
- Remove injector top O-rings and bottom caps(to prevent damage to them)
- Connect one end of a high pressure hose to injector and the other end to a small pump(resembles a simple hand pump)
- Connect a battery with a wiring harness(with a bell switch on either +ve or -ve) to the injector
- Clamp both ends of hose
- Fill petrol in the pump and pressurise to 5 kg/cm2
- Keep the pressure on and press the bell switch for 2 seconds to actuate the injector solenoid
- Repeat Step 14 till you see a clear spray through all four holes in the injector
- Repeat for other three injectors
- Repeat steps 10,11,12,14 with compressed air at 5kg/cm2
- Re-install o-rings and caps in injectors
- Re-fit injectors in the rail just taking care to put the injectors back in their original position - no.1 in slot 1 and so on.
- Connect sockets,hoses (just reversing the process of removal)
- Reconnect battery-ve on car
- Turn on ignition to start fuel pump
- Check system for leaks
- Start engine and check for leaks for 2 minutes
In my case,I observed the injectors' surface clean when they were removed but found two holes partly clogged in injectors 1,2,3 during step 14,15. Injector 4 was tops but was cleaned,nevertheless.
The car rides much better after the job ; minor jerks that were evident when moving the car from stop in second gear(eg. after speed breakers) have all disappeared.
I don't know how crude this method is but in the end,it was worth the effort.
A few queries: - How are injectors otherwise cleaned at workshops?
- Are higher pressures applied?
- What fuel/chemical is used?
- Can injectors be backflushed(I believe this will work better)?
Last edited by vigsom : 24th December 2009 at 16:49.
Reason: fine tuning the procedure
|