Thanks Steve but I have tried a different clean IAA unit and it made no difference and the auxiliary air valve is working fine because the tick-over is perfect until the car warms up.
ADZS, the thermostat is working fine and the temperature gauge goes to the middle as per workshop manual.
Hopefully a friend who has a MOT garage may be able to check the injectors on the car with an oscilloscope and tell me if one is acting the goat as the lumpyness is not every fourth time like a proper misfire.
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