Ok well i have had my new motor in my car for a few weeks now and when i first start it it will run and drive fine, but about a min or 2 into driving it goes into this fit of sputtering like missing reallybad for a couple of min. what could this be b/c it clears rite back up untill i shut the car off and restart it agian and it happens nomatter if its hot or cold. help:SNSign: