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Ask Your Question1995 Chevrolet 1500 Pickup
Question: engine ping then knock
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Answer #1
dandd January 10, 2010, 19:35Reply
MasterThe pinging may be from a bad EGR valve. Any Check Engine or Service Engine Soon Light coming on? I assume that your timing is on the money and that your truck is not over heating. Check out this Article, the CEL is about a problem, not maintenance.
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