For off car fuel injector testing, I use a fuel injector cleaning jig sold on eBay for about $10. I test them singly using a battery charger as a power source and a can of carburetor cleaner to clean and test the flow. Have had good results with it. For injectors on the engine fuel rail I use the pressurized cleaning kit that attaches and feeds solvent to the fuel rail.
------------------ " THE BLACK PARALYZER"
-87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite. "THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
[This message has been edited by Dennis LaGrua (edited 01-08-2021).]