I have a FF36, I read what it means, but I haven't a clue where to begin and diagnose the issue. Any guidance here would be appreciated as always.

 

FF36 is a fuel injection fault in the B bank. This code is set when the maximum fueling correction is applied either high or low. It is part of the closed loop including the O2 sensor. I would start there (o2 sensor). Check the connector and wiring for faults, you could even swap the sensors from one side to the other if you get an FF34 A bank then the sensor is faulty.

cheers
Warren