MK4 VW GOLF 4 1.6 AZD

Hello! I have a problem with my 02 Mk4 Golf 1.6 16v.

When i start the engine, in the morning, when its cold, it starts ok, smooth idle, but If i press the gas pedal, the engine stumbles or even shuts off. If i let the engine run for 30-60 seconds at idle, will run perfect and i can drive the car without any problem.

I have no misfire codes, no check engine light. I have good fuel pressure, perfect MAP sensor readings (300mb at idle and 999mbar at WOT), perfect lambda readings. 

Ignition system is the last to check. I have almost new Denso Iridium TT gapped at 0.75mm for LPG. VW asks for a 1mm gap on gasoline. The engine has coil over plug, its harder to see if the spark its jumping. Tomorrow I will test the coils, but I dont have special tools.

If you have any idea about how i can solve my problem would be perfect. Thank You!