Slow down? -------------- If it is a carburetor, they are adjustable. If fuel injection, its time to pay a mechanic to screw with your on board computer.
The MAP sensor measures air flow for your car's computer. The computer uses air flow to set fuel flow for the correct fuel/air mixture.
A plugged fuel filter can reduce or completely block the flow of fuel.
No, there is not. There are lots of devices that claim to reduce fuel consumption but none of them actually work. Not one.
Reprogram the car's computer.
A Throttle is the fuel control that controls the mixture of fuel and air and the rate of flow into the engine.
Yes, it would reduce air flow into the intake and cause the engine to get too much fuel.
There would be weak fuel flow to the engine resulting in sputtering upon acceleration or no fuel flow at all resulting in a car that will not start.
It could , but it would have to be almost plugged totally , to restrict the fuel flow that it was starving the engine . You could very well have another problem , but fuel filters can get very dirty and restrict fuel flow.
it help the car to modify air flow to increase fuel efficiency and handling (and to make it look cool)
To reduce friction and fuel consumption not to mention making it pleasing to the eye.
Lack of fuel, lack of air flow, restricted exhaust.
If it is really stopped up it will not let the fuel pass through and cause the car not to crank, but it would have to really bad shape to have zero flow.