hey guys please check my problem

[b3albakii]

i have 1986 325e when i am driving it everything is okey , but when i am driving it for long time more than one hour it become so stupid ... when i press the gas pedal it makes like cutting and after it reach 30km/h
and over it become normal ?
what is the problem?

[mikeedler]

o2 sensor bad or cat. overheating?

[b3albakii]

i dont have an O2 sensor .. and i feel that it is heating but it dont show in the instrument

[lolcantturn]

You have to be a lot more specific and type in complete sentences. How do you think it's overheating if it doesn't show up in the cluster?

[jlevie]

This could be a fuel system problem. A weak transfer pump or rust in the tank are possibilities

[b3albakii]

Well if i notice heat coming from the motor ..
What about fuel pump ?