Cultus giving problem in Petrol... Help!

[hkamil]

AoA... I have to repost this because i didn't get any response before. here the story goes.
I have cultus 2007 carburetor engine. The problem i am facing is that when i reach around 80 km/h ye jhatky marny lagti hy... once it start jerks the engine shuts after sometime. on starting again it gives the same problem in 1st, sometimes in 2nd and sometimes in the 3rd gear.
1) Some say it is the problem of carburetor
2) some say its fuel pump
3) some say it is problem of current

i cleaned the carburetor, the mechanic told me that i need to do the butterfly which i did but the problem is still there. The fuel pump is new but i bought a new one in order to get rid of the prob... but the problem persists @

If someone had been through such thing please let me know where the problem lies or to be precise how to get rid of it.

Experts please need your opinion/advice(s). Besides if you know about an outstanding mechanic in peshawar please let me know.

PS. the car gives no problem in CNG.

[aamirq]

have u checked the spark plugs and fuel filter?

[argtr65]

Sounds like an ignition problem,

1. Check and replace spark plugs and plug wires.
2. Check distributor cap and rotor,replace if necessary.
3. Check ignition coil.
4. Check air gap inbetween pick up coil and reluctor,adjust if necessary.
5. Make sure wiring harness of distributor assembly connected firmly.
6. Check ignition module.

[judgevt]

If your satisfied your fuel pump and filter are good and you have plenty fuel coming to the carb,check the float and float needle in the carb,make sure it's free and not sticking.