Hi , Can any of you experts tell me what ZSB 037 133 443 is and what it does.It is on my 16v mk 3 golf, it is located directly under the plastic tray that the ht leads click into.One end of it has a pipe connected to it and the other end of that pipe goes to the side of the air filter box.The situation is my golf wont start , it turns over its getting fuel and it has a good spark , but refuses to start.I noticed that when i turn the ignition on to the second click this thing (zsb 037 133 443) vibrates loudly (very loudly )which im sure it did not do before. Anybody with a 16v if you could check if your thing vibrates (excuse the pun) and let me know or if anybody know what the F*&! this is and would it stop my motor from starting ??.CHEERS