Todd, Popping when the secondaries open would have me looking for too lean a mixture. When secondaries open, depending on the carb, a lot more air is put into the manifold and it takes a lot more fuel to keep the mixture right. Check the fuel passages to the secondaries. Don 1970 AMX "The older I get, the better I was." vacuum leaks, timing retarded, sticking dist mech advance or dead vac advance. Carb pop Posted by: "Todd McGonagle" rails3@xxxxxxx jepstr67 Date: Wed Sep 26, 2007 6:37 am ((PDT)) When I accelerate over the point where the 4 barrel secodaries open on J-10 often it will stutter, pop, and then take off. Cures anyone? Todd j-10 Jim Blair, Kirkland, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10, '73 J4000 (RIP) -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.amc-list.com/pipermail/amc-list/attachments/20070929/ed330473/attachment.htm _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list