Ibiza 1.4 16v (75hp) engine problem

[cmp3hab]

Hi, this is my first thread and I desperately need help.

My car developed a strange problem in the past month. When starting in the morning (cold start) and every time during the day if i leave it off more than 15min (warm start) it starts rough, sometimes stalls, when i press the accelerator to pull off it stalls and makes loud pop, if i press the accelerator gently it hesitates but when it revs over 2500 RPM then everything is ok. There are no errors on Vag-com i changed 4 coil packs, 4 spark plugs, oil, oil filter, fuel filter, air filter, cleaned the throttle body.... still the same problem.

I have LPG on my car and when i start it directly on gas (not on petrol) there is no problem.

Please help me

 

[Slimy]

To me that suggests a temperature sensor issue causing the ECU to overfuel when warm. Have you noticed your fuel economy drop recently?

 

[cmp3hab]

The fuel economy is.constant, around 8l/100km or 30mpg and it does it not just warm also cold in the morning