I have an S reg mk 4 golf agu engine. Cylinder 4 is not firing. I have swapped coil pack and checked the other coil leads and it is a problem with cylinder 4. I am getting no spark. I have read about issues with the ICM/ ignition amp module however i have not found anything relating to cylinder 4. normally it is 1 or 3????? I am sure the problem is from the connector and not the coil pack or spark plug. I do not want to pay out anymore money as already paid out for coil pack that wasnt needed.