civdiv, you know this car inside-out. The starting issue, I guess is related to temperature of something somehow. The engine starts perfect in the morning but if I stop the engine and try to start it in a couple of hours for some reason cracks a few time before it starts and it seems like a few cylinders start but some of them just don't until I accelerate and then it's all good. It feels like it's a misfire or the not enough gas. I know the fuel pressure is ok but I suspect something with what the ecu reads from some sensors.
I ended up checking the thermostat heater because the GT1 pointed me in the direction but sure it could be one of the sensors in the dual temperature sensor.
If you know what I should check I can connect the GT1 and read all the parameters. Unfortunately some of them don't have much meaning.

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4.8is 2004 imola red
4.8is 2005 Black on Black - DINAN/2 sold
4.4 2004 X5
2003 330xi
2008 328xi - sold
4.4 2000 X5 - sold