I didnt mean to fix it!! I had a pinging problem,,about a month and a half ago I got a 75mm Pro-M maf,,when I put it in ,the car ran like sh@t!!Someone told me to twist the entire unit 90 degrees.I turned it 45 degrees and it ran better so I left it like that.But I had a pinging problem on the highway.Then I remembered I was supposed to turn it 90! ( a few weeks went by before I did it ) When I did it, it ran great,no more pinging,and it felt like I picked up 5 hp!! And in the process,the surging stopped. Woo-La