@mjuaji a few quick checks (BTW I had this same problem with a carburettor car less than 48 hours ago and resolved it)

1 - HT Leads - check all are OK and well insulated
2 - Distributor cap - cross check it is not cracked
3 - Distributor vacuum advance (if applicable - its the "flying saucer" like thing on the side of the distributor) - cross check the pipe leading to the carburettor is no letting in air. basically if the air flow is irregylar, then the vaccum will not build and adjust the gaps in the distributor.
4 - Bad plugs will NOT really give you such a problem.
5 - Carburettor (if applicable) check the "butterfly" does not have play (the problem I discovered) - with this particular problem, you need to rev high to cancel out the problem - by revving high, the intake manifold sucks more air and over rides the problem. With a well adjusted butterfly, even the slighted gasp for air bu the intake, should result in a smooth climb in revs (and not a sputtering that persists, as the engine hesitates, then suddenly picks up) - that hesitation is the butterfly.
6 - Clogged fuel filter - seems like a small thing but again, just like with the butterfly, an engine idling operates the fuel pump at a certain speed - if the filter is clogged, then basic idling is not adequate to allow fuel to flow through a clogged filter. It needs a good rev to speed up the pump and force fuel through a clogged filter.

Fuel at Shell.

[quote=mjuaji wa stocks]
Who told me?? --- Nilidiscover mwenywewe after kuamua kumwaga the whole fuel in the tank ....

@Mjuaji,
How does this fuel look like i.e how did you tell that it is adulterated and where did you buy it from?

CHILD MENTALITY!!!! NO WONDER YOU HAD NOTHING TO CONTRIBUTE EARLIER

NEITHER OF THE 2 ....



@ SIMON KABZ .... KWELI ..... IN EACH DAY YOU EITHER LEARN OR BECOME SENILE!!

THAT IS WHAT I BELIEVE.

@ CHAKA --- I KNEW THROUGH THE KA - SMELL FROM EXHAUST .... YANGU HAITOANGI HARUFU LIKE FOR THE LAST FEW DAYS ....

NILIKUNYWA IN ONE OF THE PETROL STATIONS ....

Hata ukimwaga fuel the damage done should persist....hebu say more!!!