Next issue is that removal of the air pump and associated hardware has meant that a barometric sensor contained within the RH side solenoid has been removed.

There are various opinions around as to the requirement to run this sensor but without it the ECU thinks it is operating at around 160m below sea level.

I am considering wether to wire in a resistor of 190k ohm or remove the sensor from the solenoid and plug it it. The symptoms of a rough idle match what I am currently dealing with. My tuner raised the question as soon as he saw my initial logs.