From: bob@pelicanparts.com on behalf of Bob at Pelican Parts [bob@pelicanparts.com] Sent: Tuesday, July 13, 1999 8:12 PM To: pelicanparts@csi.com Cc: Bryan Taylor Subject: Re: Webers and tach tech help Hi Bryan, Are you satisfied that the idle mixture setting is correct, and that you have the proper jet size? Also, if the throttle shafts are worn, false air will enter around them and disturb the correct mixture. Your tach itself may need replacement, if you have checked out the circuit and found it okay. Hope this helps, Bob at Pelican Parts Wayne at Pelican Parts wrote: > Hi there. I will forward you to Bob in Tech Support, who should be able to > help you out. > > Thanks, > > Wayne > > Bryan Taylor wrote: > > > Hello, I have a '74 911 with Webers, I bought a rebuild kit and I > > replaced & cleaned everything. I did not touch the shafts . They seem > > to run well but sometimes they backfire thru the carbs ( and exhaust on > > deceleration) Is this normal? I am told that Webers do this . The > > backfire thru the exhaust sounds like an air leak but I checked that. > > Also every now & then my tach does'nt work I replaced the wire from > > the dash back this has not helped, any ideas?