Just had the carb rebuilt (85 305 155,000mls) know the engine is "tired." When the carb was rebuilt the shop said something about a choke vaccumm going-so they replaced it. Now, right after I start it up it will die. Very difficult just to get it goin! I just had the plugs replaced 1000mls ago, and that guy said the third cylinder on each side was foul (plugs). Could I have bad plug wires? The truck still diesels after the carb rebuild as well? What should I look at doing-timing? very confused. . . Driving your blazer=FUN!