Cleaning Injectors

[SimonR]

Hello all,

After the advice from Gary and others on the forum, I'm going to get the injectors on my EFI car cleaned while I do the conversion.

The thing is that my girlfriend is a scientist and has access to a Sonic Bath in her lab. I'm wondering if I could use this to do the injectors rather than having to send them away and pay lots of cash!

My question to you really is how to do it - what solvent to use and how strong the sonication needs to be.

Also how delicate are injectors? I'm wondering how best to set up the process so as not to damage them.

If anyone's got any advice or experience then please let me know!

[E_T_V]

Funnily enough I'm looking at the same problem for the missus T16.
I was going to use isopropyl alcohol with a low power cheap 12v battery charger connected to them to pulse them open and closed at 50Hz.
Otherwise if that doesn't prove successful then they are about £40-50 to have them cleaned professionally.

[Russ]

I think mine were about £28 each at a place in Norwich. Thers a chap on ebay that does them cheaper and offers 24hr service

[G Force]

Hi Simon, We had 2 types of rig that we used to clean the injectors with and both gave excellent results which were measurable by the dyno and the emmisions testing equipment.

The first was supplied by Wynns, this was a pressurized aerosol canister that we connected to the injector rail via a pressure regulator. The fuel return was blanked off and the cars fuel pump disabled by pulling out the fuel pump relay. The engine was then run on the canister contents on a fast idle until the contents ran out.

The second rig was supplied by Forte and gave the better results. This rig had its own fuel pump and a resevoir that the cleaning solution was poured into, (2 tins of injector cleaner & 1 tin of gas treatment). The rig connected to the fuel rail and the fuel return was also connected to the resevoir. The cars fuel pump was disabled in the same way as before, and the engine was run directly from the rig until the cleaner ran out.

Obviously both rigs were supplied professionaly to the rover dealers by the additive maufacturers and the service may still be available, but the forte cleaners could be bought in the parts stores. The forte rig would be simple enough to replicate with a suitable electric fuel pump, some fuel hoses from a scrap car and a plastic resevoir.

Gary:)