Hello new to the forum I’ve got a lot of my technical answers from here up until now when I registered because I’m at a complete loss, I have a 94 z28 LT1 I bought the car not running needed head gaskets I replaced head gaskets head studs and other odds and ends I got the car running ran good initially then came the ignition coil took a s*** so replaced that then it developed a rough idle so replaced the ignition module and optispark, plugs and wires all AC Delco now the car runs rough and rich no back fire no nothing what I have found is that if I unplug injectors one at a time it changes in the way it runs well if you unplug injector 3 and 5 no difference is made the connectors have voltage to them but they seem to be just dumping fuel I’ve replaced oxygen sensors and all still no difference I have no idea why 3 and 5 make no difference when unplugged I ran a scan and it says left bank running rich from the code I got any insight on what this issue could be I’m at a loss and have not yet even been able to drive the car due to this it burns through so much gas at an idle fuel pressure is around 36 at an idle and 40 under load which is low but still don’t answer why them two injectors make no difference unplugged??? Any help please!