hi i have a 83 bj60 and it started to spit and sputter wen accelarating i new to diesels, someone told me that its sucking in air i droped the tank to see if the pick up tube was cracked it was in good shape the lines from the tank to the motor ar in good condition im not shure what to do i dont want to start spending alot of money in it its my wheeling truck thanx for now