Chevrolet Repair: excelliration, throttle position sensor, fuel pressure

Question
my car will not excellirate i.e.25mph

Answer
Hi Jazzy,
Gee, some more information would help on this end. I have no idea what year, make, model, engine, etc that you have.
If it is fuel injected, the fuel pressure may be the problem, weather from a plugged filter, worn pump, etc.
Another possibility is the throttle position sensor.
Van