Wynne davies

Hi I have same problem with my disco 1 3.9 v8i manual it will stall after a few minutes from starting doesn't matter if it is hot or cold and won't restart just turn over with out firing disconnect the battery for a few mins and will start five times out of ten will run allday then with no issues or will play up cutting out frustrating and dangerous if on the motorway and cuts out any ideas gents no engine check light and no codes in the ecu