White smoke raw fuel out exhaust Dodge Grand Caravan 2002 3.3 V6 code P0206

Van was running rough so I changed the spark plugs and wires, starting running worse and code P 0206 and P0206 and P0355, P 0356, replaced ignition coil and still had codes P0206 and P0205, replaced both 5 and 6 injections and still have the code and now white raw fuel smelling smoke and vehicle chugs and sounds like it wants to back fire and stall. The smoke is really heavy when first started. The injectors voltage for 5 and 6 are fine, they are getting spark. Prior to this happening I was getting a small leak and large leak code but I have since replaced a few lines and am no longer getting those codes.