I have a weird problem. I warm my 91 honda Civic dx up before I drive. As I am driving out of my neighborhood I get a slight hesitation when I go over the speed bumps, or accelerate. It seems to go away after driving for 15 mins. I have a 45 min commute. My ECU shows no error codes. It happens after work too. Outside air temp seems to have no effect on it. Have anyone else had this problem and if not What can I do to fix this?

 

It could possibly be a fuel pump I'm not too certain I hope that helps

 

I also noticed that if I thottle the pedal in neutral it shudders for a sec. But, the next thottle it revs up correctly.