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I have a 95 SS with a 4.3 in it. I have noticed that when it idels that it cuts out and sounds like it might die but keeps running. What could cause this? I was told it might be my plugs.
 

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Possibly your EGR valve or O2 sensor. Have you done a tune up lately? I would pull the EGR valve off and check to see if it has carbon deposits in it, it if does clean it out. I would also have the truck scanned for trouble codes.
 
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