I know about RC Engineering, Witchhunter, and Mr. Injector. Because Mr. Injector is in my state, I'll almost certainly use him, but I was thinking:

 

Couldn't I use one of the ultrasonic cleaning machines myself? It wouldn't be terrible for me to have one of those machines for other purposes, and maybe I could make it work to clean my own injectors as well.

 

Any thoughts?

other than cleaning they also test before and after flow rates, spray patterns, and if they leak or not.

 

if you're trying to track down a specific problem and running issues or want another 200,000 miles out of this car you might want to use them, if it's just preventative maintenance kind of stuff then do it yourself.

If you have a few spare parts (fuel pump, pressure reg) you could build your own rig for testing spray pattern and flow rate.... But seeing as you'd probably only use it once or twice, it'd probably make more sense to pay someone else to do it.

Unfortunately for me, I'm no longer in a place nor a position to have much in the way of spare parts around.

 

This truck (my Baja) is not something I'm likely to have the capacity to replace for a while, so barring a major failure I'd like to keep it running well. Based mostly upon UOAs, but also upon the markedly non-stellar reputation of Subaru injectors in general, I'm slightly to moderately suspicious of an injector(s) dripping slightly or having other difficulties.

 

I've only had gasoline injectors cleaned once before, which was on my ex-XT6. Although the shop did note better patterning afterwards, no improvements were detectable through mpg, UOAs, or running/operating properties. I did that one mostly ...just because.

 

I can see the point about having feedback on flow rates and patterning, so I probably won't try this myself. Thanks for the input.