2003 Honda Accord Car Troubles

Hello Engineers.
There is a Problem am having with my car and have tried lot's of solutions but it seems am just wasting money on it. Here is it when moving On a very high speed Maybe when the car get to some Kind of Stage were it suppose to Pick and Move more faster the next thing it will start jacking and wont move forward. It will be at the speed it coming from but wont move more faster than it.I explained to some mechanics they told me to change the fuel Pump I did that. They Told me to Change the Air Flow meter I did that but still Its still giving me the same Problem But what I noticed is this it does that mostly midnight. Please can you Kindly Tell me the Caused of this and what I can do that will make it Comes back to the normal Way
Seun