Hello mate, i had the same problem, car would stall when i dipped the clutch or came off the throttle, was an intermittent issue, did as you have,injectors dizzy etc, turned out to be a intermittent fault with the alternator, it would work fine then would stop charging and after 2 mins the car would stall, new alternator problem solved! worth letting the car tick over and put a volt meter on the battery for 10 15 mins and see if its taking a charge,if it starts dropping you know the alternators naff.