Missing/black smoke frm petrol car

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Missing/black smoke frm petrol car

What can be the reason for black smoke and missing frm car when on petrol
car is run on petrol atleast twice a month when on motorway for some time, last night i came all the way on petrol..
What can be the reasons

bad quality petrol (filled frm chakri M2)
bad carburator (engine recently overhualed & so as carb)
bad fuel filter (changed recently)
bad fuel pump (less probable)
car is fine on cng & usually have water drops

can anyone help??

Gari.pk User 6419 asked on 10 Aug 2010 11:18:26 am

1 Answer

384 views |

Zubair - on 10 Aug 2010 11:18:45 am

try nasa carb cleaner or whiz ka carb cleaner! its simple...jus remove ur airfilter n all n spray the throat of the carb while reving ur car occasionally...remain spraying it until the carb is totally clean...n den switch off ur engine n start spraying it again ull see sum petrol like substance collect in ur carb and it will be bubbling remain spraying but don spray too much by too much i mean excess mein in 1 short spray!after ur done spraying start the engine at first ull feel keh car race nai pakar rahi it will sort of vibrate but remain pressing the accelerator aik dum the car will rev meaning sab kachra wachra carbon etc exhaust say bahir! this is 1 way of cleaning the carb the other way of cleaning it is using fuel additives...STP ka ata hai for cleaning injectors and carburetors u jus pour tht into a full tank n it will gradually start 2 clean deposit build up's itself as petrol is sucked into the carb! i guess nasa carb cleaner shud cost u around 220rs and this stp fuel injector/carburetor cleaner shud cost u 150rs! n this stp shud last u 60 litres!