Also you may find that this happens when you have a near empty tank just before the fuel light comes on. This is a design problems due to the tank being dished so when you slow down all the fuel slides forward away from the fuel pump for a split second meaning no fuel therefore no go, so be smooth on the roll off and it should be grand. Also as kev and others said up the rev's and check your ECU is the non faulty one.

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Plough on