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			Are you sure its the engine and not electrical issues? Weak alt, etc? 
 
If the idel is not lopy (like 1500 to 3000, back to 3000, etc) its probably not a vac leak. Pull the new plugs out now and see what they're like just after running for a while. Also, check the fuel filter...
		 
		
		
		
		
		
		
		
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