please help, we are on route! it loses power and drives irregularly

[jimenete]

The car is a fiat 126ELX, polish. Maluch. Its from 1999 and it was working ok until the two bolts that fix the carburator to the engine block broke. Now this part is very good fixed and the carb is in the correct possition.
The problem now is that its starting correctly, with a good sound and so on. but when it comes to accelerate it, it doesnt do it continiusly, its very irregular, more irregular with the 1st and 2nd gear engaged, and it looses a lot of power. The engine is like working for a second, stopping for another and so on. The engines goes better with the choke on
We are trying to take it from poland where we bought it to spain, but if we cannot fix this we will have to leave it in france.
Please if somebody knows which is the problem o what else can we do tell us

[Darrell]

CHeck the fuel pump.

Often the rod that pushes the pump wears-away. It will start but it is not pushing enough petrol.

[jimenete]

ok we will try to check that this afternoon
is there any other idea to check everything at the same time?
the air filter is a bit dead, but we drove without it and the problem is still the same
thanks

[nrg19uk]

Check the seal round the base of the carb you said the bolts have come undone which has broken the seal allowing air to be sucked in

[jimenete]

we change both seals when we changed the bolts, the one above the plastic part and the one under, so hopefully both are still ok

[1973/126]

 Have you cleaned the carburettor before putting it back? If not try to take the jets out and blow them through. Could be just some rubbish stuck in there.