my car developed a problem after engine overhaul....car bogs down after getting a bit warmer after driving a few KMs. at first i was doubtful about carby which was re configured using new carby kit. but after opening and reinstalling it 3 times realized that there wasnt any problem.
next suspected thing was fuel pump, petrol lines, fuel tank, fuel filter etc..
lines nd tank was clear. filter and pump changed but problem presist...
mechanic suggested to increase the length of small rod that is responsible for pumping the fuel pump...did so...but not resolved....
finally tested the electric fuel pump....chinese wala...nd problem solved...no issue yet....