I have a knock but only when accelerating at high rpm ,does not do it all the time changed both tensioner so idler pulley plug wires plugs ,does not do it when idling

20

Asked by Mrbucko1 Oct 16, 2015 at 10:35 AM about the Chevrolet Silverado 1500HD

Question type: Maintenance & Repair

7 Answers

70,115

so is it a rod knock or a pre ign/over advanced/low octain gurggle??

4 people found this helpful.
20

Sounds like it comes from alt. But pulley is tight ,could it be possible that it is bad inside

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