I have a chain auto supply reman carb (q-jet) that has been plauged with problems. From previous posts, it was suggested that I had float problems. The idle circuit is impossible to adjust, it runs pretty good at about 1200 RPM and over, it smokes black, if I stab the throttle, it will idle (a little high) for a few seconds and then die, and last but not least, it pops/backfires through the exhaust. The last part is what is bothering me. Will an over rich condition cause modest backfiring? The other symtoms say float level/needle & seat problems. (thanks by the way to everyone that has pointed me in this direction in the past) I can take the carb back where I got it and get a warranty exchange, but I don't want to return it if there could be another issue causing this. I have reservations about taking it apart and by default voiding my warranty. The timing is set, the points and dwell are adjusted, good plugs, etc...
Has anyone had problems with reman carbs from one of these chain stores, or am I just lucky like that?