ok, lets start over ......i have a sr20det 1989 s13 ,i test drive it in my 3acer frield ,that way i dont get pulled over on my road and get a fine ,for no tag,no brake lights (getting it prepped for paint), no front bumper (getting it prepped for paint),no muffler ,and no insurance.......and while on my test drive,i found the problem statted above ....does not want to rev past 5000 rpm (nutral or drive)studders..... unles i ease into the gas .....i do have a very weak battery (does not hold a charge,i jump it)....and if i misspelled anything im sorry for being sld