it depends on what car and engine. it could be your fuel filter, or a vacuum leak. your converter might be pluged also. these are some things to check out about the problem.
A car goes faster when you accelerate. It slows down when you brake.
what would cause my car to run fine when it has first started up then after a while first gear will kinda bog down.
To make the car go or slow down.
The driver was told to accelerate get faster because he was driving to slow.
mass air flow sensor
There are several reasons why a car will start and then bog down when the accelerator is pushed. Some of the reasons could be plugs, fuel pump, or the catalytic converter.
It does not always mean that will happen, but it is certainly a common cause and if your car is sputtering and bogs down it would be one of the first things to check.
Accelerate - gravity will always try to pull the car downhill.
The reason that he chevy truck may continue to bog down, is due to the car needing to warm up before starting. There may also be an issue with the fuel pump.
Is it bogging down? if thats what your referring to, then maybe try a fuel pump if yoir car has one.
Hesitation during acceleration on a 1999 Rodeo means that when the gas pedal is pushed down, the car does not immediately accelerate. It may take a second or two for the car to accelerate in this situation.
I would check your tires they could be out of balance. or a tire could be bad .