When I start my 72 240Z, it takes quite awhile for the engine to warm up. It hesitates real bad and actually pops after it starts to speed up. What could the problem be? Put some carb cleaner in the gas tank and some water treatment. Any other ideas?

rebuild your carbs? actually, check your A/F mixture and check your balance. mine was doing that for the longest time and then i got ztherapy's videos and rebuilt my carbs. running smooth since then.