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Renault laguna11 - Intermittent - Terence Ingledew
The car starts ok I drive about four hundred yards and the car lacks power throttle is air wire then about ten seconds later the car is normal and will run most of the time with out problem I now have management light on went to garage he said it was intermittent on number one cylinder and fitted new coil but after a short run it was just the same as anyone had this problem
Renault laguna11 - Intermittent - Xileno

With a petrol Laguna I would check the throttle body first. Give it a good clean out.

Renault laguna11 - Intermittent - elekie&a/c doctor

Are you sure that the correct coil has been changed? No 1 cylinder is gearbox end.