Fuel injector cleaning system?

[Len Sabatine]

   We routinely use Delco X66 , also helps loosen crustaceans from back of 
valves
  and upper Cyl areas. The scheme you mention gets it done.
   Len
>I run a full service repair shop & have been around several injector cleaning
>systems. Nothing I've seen seems to work better than a 1/3 Delco X66 & 2/3
>gasoline mixture run through the pressure test port with the return line
>blocked off. I've seen factory systems & homemade systems alike. It's all a
>matter of hooking up a reservoir for the liquid with enough pressure to feed
>the system (13 to 45 psi depending on vehicle) & coming up with a way to tie
>into the fuel rail. Biggest advantage I find with the factory units is plenty
>of adapters.    Wallace O.
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