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.