coil-over plugs
 

how often do you have to change them. and i was also wondering if that is the reason why i have a misfire in 2nd and 3rd cylinder randomly

coil-over plugs?, LOL

Have a someone/some place scan the ECU for trouble codes.

i did at at autozone thats what they said that was the second time i took it the first time and i thought it was cause i didn't have any bolts holding down the plugs but i had replaced them and still the same

replace your spark plugs. If the doesn't help then get two new oem coil packs for those cylinders.

i had already replaced them with bosch platinum 4 still doest it. do i have to replace my timing belt because i had bent 13 valves and i think i might of stretched the belt by over reving