Classic F.A.S.T issue

[Z8's]

I am having an issue with my classic FAST, I have a wideband on both down pipes(twin turbo setup)passenger side is showing 1.5 points leaner than the drivers side .I pulled the plugs and found that the #8 cylinder was much cleaner than all others.I changed the plugs and ran motor approx 10 minutes and that plug looked brand new. I restarted the engine and pulled injector plugs one at a time and had no rpm drop on the #8. I checked harness with noid light and did get pulses on all plugs. I sent the injectors out and had them cleaned and flowed (ups lost them so I had to aquire another set) . Re installed the injectors this morning and still doing the exact same thing,how can I properly check to see if injector driver is functioning ? Is Craig Smith around!

 

[HighPSI]

Put number six injector plug on number eight and number eight on number six and see if the problem moves