Technical engine throttling

[NikoolM]

Hello, I have a car Fiat punto 1.2 2002. The car starts fine, while driving it also runs fine for a while. Just out of nowhere, the car starts to choke, starts to jump, like when you drive slowly and don't shift down. It doesn't do it at idle at that time. (sorry for the description, I don't know much about cars) Could it be caused by the transmission unit or lambda probe?
I will be grateful for any answer.

 

[GrandePunto PL]

Do you have any Czech/Slovakian local Fiat forum? Or maybe Polish? That should be common problem = known solutions.
Engine is misbehaving when hot? Try ignition coils (check sparkplugs too) or crankshaft position/speed sensor.
Then other sensors (like coolant or intake air temperature, MAP). Lambdas too (if first oscillates on idle).
Maybe it's electrical issue (wiring, plugs, connectors) + water (rain)? Power delivery, main "ground", relays, fuses.

The problem is, you "don't know much about cars", so you will have hard time diagnosing anything (and random parts swapping is not cheap).
Consider taking the car to the mechanic. They should handle simple Fiat. Quick fix (one day).

 

[NikoolM]

Máte nejaké české/slovenské lokálne Fiat fórum? Alebo možno poľský ? To by mal byť bežný problém = známe riešenia.
Funguje motor zle, keď je horúci? Skúste zapaľovacie cievky (skontrolujte aj zapaľovacie sviečky) alebo snímač polohy/otáčky kľukového hriadeľa.
Potom ďalšie snímače (ako teplota chladiacej kvapaliny alebo nasávaného vzduchu, MAP). Lambda tiež (ak najprv osciluje na voľnobehu).
Možno je to elektrický problém (káblovanie, zástrčky, konektory) + voda (dážď)? Dodávka energie, hlavná "zem", relé, poistky.

Problém je v tom, že "veľa o autách neviete" , takže budete mať problém niečo diagnostikovať (a náhodná výmena dielov nie je lacná záležitosť).
Zvážte odvoz auta k mechanikovi. Mali by zvládnuť jednoduchý Fiat. Rýchla oprava (jeden deň).

Yes exactly, it only happens when the engine is hot. It will only do so after some time. My friend knows more about cars, so I will forward this answer to him. Thanks for the options.