1999 1.6 Zafira when cruising on motorway for a while, when i shut off the throttle and put it back on again its as though the engine has cut out, in fact it has cut out when i dip the clutch. it then wont start again for a few minutes. There is no ecu fault light flashing so i think it may be mechanical, ive heard reports about the small vaccume pipe getting clogged. Any help would be appreciated
