Only at start up in the mornings and if the car been sitting for a while,  does'nt matter if the weather is cold or hot.  It seems like when you mix up your spark plug wires,  a minute or two after warm up its fine.  What could it be?  Bad coil pack?
	
		
			
		
		
	
				
			 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		