Apparent think I will need help on this.
I read most of the post about HOT weather startup problem, but all of them does not seem to be 100% adequate for my situation. Most of them are regarding TDI engines, or the issue is that the car do not fir up at all. This is not the case for me.
Car: Skoda Octavia VRS 2.0 TSI 220 hp. Major service has done 500 km ago (spark plugs, etc.), the problem before the service and after service, Skoda workshop had not identified the problem, stop/star system, key-less.
Situation:
Car in an ambient temperature of around 30 degrees C (what is cold where I live) but in the shade, I would say starts very well. When exposed to sun and being parked outside in ambient temperature around 40 deg C developed a problem where the very first startup looks as follow:
1) engine is cranking good, and the engine goes to something like 900 rpm,
2) immediately when it reaches the rpm you can notice very uneven engine reves and the engine stalls
3) car by itself initiate immediate start, and all is good (no problems)
4) for the rest of the trip all is good, starting stopping (all)
Dealer during major service had not identified any issue (it is kind of random), the problem happens when it is hot outside, the battery is 2 years old. I had not made OBD diagnosis, but I can report that the engine light is not turning on the dashboard.
I had noticed some post about software update, but that was for TDI engines, few about ERG but that had so slightly different symptoms, few about thermostat issue wherein this case engine did not start at all (different to my case) so now I am in the point where I am not sure where do go no.
Maybe one of the forum members have knowledge about this issue or can pinpoint me to the correct thread.