my car starts now but then wen im drivin it turns off on meeh or wen im juss idling it only happens sometimes and then wen i try to turn on my car again it bloggs and i have to keep on turnin for a long time like it juss keeps on cranking n after awhile it turns on again i dont kno wat the problem is

 

sounds like it could be the main relay losing connection, it kills power to the ECU / fuel pump. its a common problem.