Mine did the exact same thing, and I had to replace the distributor. Check the pickup coil, aka: stator coil. A new one is $20 at the auto parts store, ad a new steel gear dist is about $90. 
Caymon 
		
	
		
		
		
		
		
		
			
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				'90 GT Under construction 
Best E.T. = Fast @ High Speeds - OK So I Lie. So What!!!   
04 F-150 STX 4.2L 5 spd
 Rice Haters Club Member #128
			  
		
		
		
		
		
		
	
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