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Re: 5.3l engine knock
Ok, I swapped both of the knock sensors and drove it for about 5-600 miles. Then the codes have started popping again. I had recently replaced the spark plugs with NGK's, so I pulled them and put factories back in. Codes have reappeared after that swap. There doesn't appear to be any real knock, and the codes don't pop immediately they take at least 70-100 miles of driving before they come back. Can anyone suggest anything else to look at?
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