I am new to the forum. I have a 98 golf I put a cone intake filter on. It did great for about 6 months or so. Then one day the check engine light came on and would not run good at all. It would run as long as you didn,t try to give it full throttle then it would almost die out. I took it to a shop they said it was the MAF sensor I found a used one didn't help. I didn't think it was the filter I put the factory airbox on solved the whole problem. Its must have been the vacum lines on the airbox. What are you supposed to do with them? Has anyone else had this problem?