3800 Buick - Replaced injector O-rings, now problems (Page 1/1) 85sliverGT FEB 22, 09:40 PM 1997 Buick Lesabre, Series 2 N/A 3800 The car had a leaky injector between the injector and the rail so I replaced all the o-rings, re-assembled, and now its running poor. When i first fire it up the RPMs fly up to 2-2.5k, then it stumbles down and almost dies, give it a little gas and it flys back up to 2k, then it almost (or does) stall out. Im getting 1 code - P0300, random/multiple misfire. I have checked and double checked all the injector wires are plugged all the way in, no unplugged vacuum lines, nothing obvious. Any ideas at all would be appreciated! MstangsBware FEB 26, 12:29 AM Gonna guess leaking between New orings and fuel rail. Did u lube orings so the rail would seat properly and not tear the orings? 85sliverGT FEB 26, 05:59 AM Very close! The rail was bent slightly preventing one of the injectors from seating up on the bottom. Grabbed another rail at the junk yard and she was good to good. I would have just deleted the thread had that been an option