Hey. I’m not sure how to link or send you to the discussion I had. So I will try to copy and paste it. So sorry so long but this worked for me.I'm having the same issue with my son's 2014 1.4T. New plugs. New ignition coil x2. #1 misfire and has blowed the 2nd coil and keeps blowing the 15amp injector fuse. Could a bad injector be the problem? I've also cleaned and reconnected all the ground wires I could find.
Today I took the computer connector apart. I found corrosion on number one pin for the #1 coil and #2 pin for #1 injector. Power was back feeding from the second pin to the first pin. Cleaned up all the pens in the connector and put back together. I clean the connector up for the center inside the thermostat housing. Then replace the light blue wire between the thermostat sensor and the computer connector. Replace the thermostat housing assembly with the sensor. Re-check my test and it all came out good I only had .015 volts. - all good. Put dielectric grease on all the connectors. Running good today will update after a couple days of running.