Here's a response I got from the owner of cruzinperformance.com regarding cleaning injectors and his thought on fuel conditioners. Sounds like a nice fella.
<snip>
Thanks for the compliments (on his site). I like people to understand what they are paying
for and with the internet, the best way I found to do that was to put
together a step by step pictorial. It isn't "all encompassing" for all
injectors however it does at least give a basic description of what the
processes are.
Actually, if your injectors ('96 FZJ80) are the standard "top feed" style like what is
pictured on the website, the cost is only $12 per injector for flow testing
and cleaning plus whatever the actual return shipping cost is. This
servicing includes replacing the o-rings, pintle caps and inlet screens. A
copy of the flow test data is also emailed to each customer after the
injectors have been serviced.
Injectors with "hose ends" (such as what are used on Jaguars, some Porsches,
VW's etc) add to the cost because the hoses need to be replaced during the
servicing of the injectors.
As for "fuel system conditioners", I have a "love/hate" relationship with
most of them. They do a good job of cleaning the fuel system however
generally what happens is that they clean not only the injectors, but also
the fuel tank, fuel filter, fuel lines and the fuel rail. The debris that is
dislodged ends up in the inlet screens of the injectors and plugs them up.
The end result is that they bring me lots of work so that is the "love" part
however I "hate" what they do to the fuel systems.
The only "additive" I will ever use in my own vehicles is a can of "dry gas"
once a year to aid in the removal of any moisture that accumulates in the
system. I also use Stabil in any of my vehicles that are stored for lengthy
periods of time to help keep the fuel from becoming varnish in the system.
Thanks for inquiring about my services. Let me know if you have more
questions or need additional information.
Rich Jensen
http://www.cruzinperformance.com