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Discussion Starter · #1 ·
2004 explorer 4.0
I changed 6 plugs and fuel filter last week. Plug gap looked about double what it should have been.
I changed oil about a week and a half ago. I used the walmart brand super tech synthetic oil. My last vehicle started knocking all of a sudden one night too and close to a oil change same oil brand. Tonight I started the engine and it started at a high idle then a loud knocking sound all of a sudden. Oil level was at bottom line of the operating range.
I didn’t change plug wires.


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