The most common reason your vehicle jerks when you accelerate is because of an issue with the engine. Every traditional combustion engine requires three things to function properly: fuel to burn, air to provide oxygen to that fuel, and spark to ignite the fire and propel the car forward. If any of these components aren’t working well, the engine will jerk as it struggles to maintain a smooth acceleration rate.
In some cases, the jerking when you turn on your vehicle may simply be due to an air filter that has become clogged with dirt and pollutants. You can clean the air filter to see if this solves the problem. If not, you will need to replace the car’s fuel filter and/or fuel pump.
Another possibility is that your transmission is having issues. If you have an older automatic car, this can be due to a failing clutch or a bad torque converter. This can be fixed by a mechanic and shouldn’t be very expensive.
You can also try to check if the transmission fluid is low or leaking. If it is, you can fill the tank with the appropriate type of gasoline to see if this helps. This problem can also be caused by a loose or worn drive belt. If this is the case, it should be replaced by a qualified mechanic as soon as possible to prevent further damage to your transmission and other car components.