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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