So ..the other day I was toolin around town in my 89 cherokee ,5-speed,4.0 FI,and I go to take of from a stop light and bang...she just shuts right off and wont start for about 15 min ? Also Ill be drivin around and itll just start spittin and sputterin and ill put the petal to the floor just to keep running on,if i stop same thing happens ,15-30 min of lookin like a.....well u know.It just happens out of no where high speed and rpms,low speed and rpms,from starts,during shifts. Help cuz it has me smackin my head on the wall,Thanks