Glad Emerald agreed about the extra shot of fuel Al. It can take at least a couple of revolutions of cranking before the ECU even gets in sync, so although that initial shot is important it also needs it over the first few seconds of cranking.
As soon as it fires the revs rise and take it out of these cranking sites on the map and gets the correct fuelling anyway.
if it persists I'd take it back to your Dyno man. he should have done this for you when he did the mapping if he was worth his salt.
Agree about aeration of the fuelling and vaporisation being a possible cause too. Your Bosch 044 pump will flow a lot of fuel on tickover when at pressure but the injectors taking very little (that pump is meant for big turbo cars) and if you haven't got return feeds down to the bottom of the tanks. Also the amount of fuel in the tanks may affect this if you are running quite low when it is sitting and getting hot. Would have thought the fuel circulating and in the tank would need to be quite hot to do this though. With the open slats of our engine bay though not sure our cars would ever get as hot as a car with a tight fitting insulated bonnet and hot rad. Stick a fuel pressure gauge on and see what happening at your standing temperatures.
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