I know i mentioned this before, but make sure the spark plugs are hooked up right. A low idle with the throttle doing nothing sounds exactly like when it happened to me. 
 
disreguard if you already checked. 
		
	
		
		
		
		
		
		
			
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				96 Cobra - a bit too stock. 14.0 @ 101
			 
		
		
		
		
		
		
	
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