Dani, Opening pressure is the difference in most of the injectors unless they have different fittings. I can test the injectors real quick for leak down No charge. Then if the pattern is off, most of the time the cleaning will fix that. They have a small filter in them. John Hervey www.specialtauto. -----Original Message----- From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf Of stainlessilusion Sent: Sunday, September 04, 2005 1:17 PM To: dmcnews@xxxxxxxxxxxxxxx Subject: [DML] Injectors Seems my injectors are the cause of the fuel system loosing pressure. When the engine is off and system pressurized I notice on a few of them that the fuel is slowly seeping out of the valve. These were purchased new in 01, cleaned a year ago, and I currently have injector cleaner running through the car. Does this mean internal springs are shot? What are the differences between 0 437 502 022 injectors and the 0 437 502 047 or 004 injectors... I'm guessing the connectors? -----Dani B. #5003 To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/