Hi guys, My car is a 98 tdi 110 afn engine. I have heard a hissing noise recently and thought it was the recirculator or egr thing. But upon inspection just now I noticed that it was around the injector no.1 (the one nearest the windscreen) and I can feel air blowing out of it. I undid the fuel pipe ontop bleed it a bit and retightned it properly, and I also made sure the housing clamp for the injector was fully tightened. But it is still blowing air and I am not sure how or why. Any help would be greatly appreciated.