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I have a 1986 GMC school bus, I put a rebuilt carborator (as the seller strongly suggested) I understand that are various types of carbs that can fit this HOLLY, knowing this and that adjusting is needed, I still have fuel problems via the carb? The bus will not hold a idle. Prior to the new carborator being installed the bus ran very well, this new one after adjusting the fuel intake is still making the "blue" smoke out of the exhaust. Any one know what to do!!
I have put in new plugs, plug wires, firing harness and battery. Again I looking what to do, I know the engine is sound, do I need another more specfic carb?