If you're referring to a jolting sensation while traveling in the car, it's probably kangaroo petrol.
The most common cause for surging is a vacuum leak
No, there should not normally be any engine surging while driving following installation of a new fuel pump.
bad battery. it gives off the rest of its power when its about dead. and that's what causes surging
Engine surging is usually due to insufficient fuel supply. Probable causes could be an air leak in the fuel system, or possibly a dirty fuel filter, causing fuel restriction.
mobile phones
The correct answer is : drinking and driving
Your check engine light will be on and you will feel bucking or jerking while you are accelerating. You will also have an idle surging, sudden stalling of the engine, and a sudden surge in speed while driving on the highway.
Drinking while driving
Oil in the distributor.
A lot of possible causes, I recommend a careful investigation.
Separation of the ethanol due to water in the gasoline.
That only usually only happens in a manual transmission