Problems with Mazda Protect 2002 Motor 2.0L

I have problems with my mazda protects year 2002 engine 2.0l when it is hot when it rises a bell and if it revolutionizes it stops doing it but then returns and when it starts from zero it falls asleep as drowned and after a few seconds it starts strong I need advice already scan it and it does not mark anything and change fuel pump and follow thank you very much beforehand I appreciate a lot the Alluda can give me