Technical Help! Rough Idle and Stalling.

[Fiat500Fiat500Fiat500]

Hi, new member here, nice to meet y'all.

Car started to have inconsistent idling, when the car is idling the sound it makes goes up and down every few seconds.

I have installed a new throttle body, new spark plugs and a new MAF sensor, however the car has improved ever so slightly but still stalls after a while.

Airbox is in good condition and the air filter is new.

When installing the new throttle body I noticed there was some oil inside the air intake manifold and also inside the MAF sensor hole. Please see image for reference below.

The car does not provide any fault codes on the OBD reader.

If anyone has any advice or experience with this, please let me know.

Fiat 500 312 1.2 Petrol 69 hp / 51 kW 2007 - 2025 169 A4.000

Thanks for yout time in advance! Much appreciated.

 

[The Panda Nut]

Definitely clean this out. I have fitted catch cans to ours which eliminates this oil getting through. I used clean rag attached to a thick wire it improved mine. Change the plugs too, they dont seem to last long. Next stop is injectors. Plugging in to MES might help. Some on here in the Mes register may help.
I had an issue like yours. I ended up doing plugs, leads coilpack and cleaning throttle body and manifold. New throttle body may require ECU relearning / proxi alignment.It was fine after but I have no idea what item fixed it. Sorry.