This system may help with the carbon problem that builds up around the outlets on the nozzles of the injectors, that would be about it.
The main problem with all CRD engine injectors are how hard the injectors are worked by the fuel delivery system and the ECM or the ECU.
High pressures and multiple spray patterns in the cycle take there toll on the internal parts of these injectors, especially the Denso ones. High wear of the needle and other components is the problem here, fellow members.
If you get the rattle or the feedback values are found to be out of range (-3.0mm3 to 3.0mm3) your only option is to change out those injectors as a set of four for the 1KD-FTVs.
That's it really, in a nutshell.
A couple of options on buying injectors.
http://www.amayama.comNew injectors in the Toyota boxes : Around the $380.00 mark each, total : $1520.00.
Baileys exchange injectors : $1,100.00 including GST for the set of four.
You can also go to a Denso dealer and pay about $2,200.00 for the set.
Toyota Parts is $4,400.00 trade for the set of four.
If you want to clean the EGR valve, the elbow, extension housing and the throttle body or venturi, you have to physically do it.
Fitting a catch can pretty well stops the oil coating or residue in it's tracks.
I have now had a couple of vehicles throw fault codes in relation to the EGR valve piston getting gummed up with that black crap. So you should get these components cleaned when you change out your injectors, I reckon.
The Roo.