Thanks chaps. It was a very nice petrol station. Automatic pay at pump only in a posh area called Donk. It was busy so would have had a high turnover and was only cheap due to the low tax and duty.
Last night I let it cool down to about 20˚c and it still did it a bit.
The idle was OK, but breathing on the throttle >900rpm reulted in a misfire which got worse the higher the rpm before smoothing out or not being noticeable at higher revs.
I measure the smooth running control in VCDS as injector 4 looks to be the odd one out and exceeds the upper limit of 2.99 mg/rev when the problem manifests.
I'll try again this morning. Put a bit more diesel and some 2-EHN additive in last night.
Last edited by snapdragon; 23rd April 2020 at 08:19 AM.
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