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Weird sound at high rpm

lukesmechanics1969
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lukesmechanics1969 New Member

lukesmechanics1969

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Ok so I have a 2014 gmc sierra 1500 4wd with 5.3(l83) in it and I just got it had to replace the oil pump because of the solenoid going bad anyway have the truck back together never got on it like that until after I replaced it just to be sad I also put a Diablo tune on it for 87 octane and dod delete and when I’m driving not all that time it will make a kind of backfire sound maybe pre detonation and this sound I have a video of it only does it sometimes just kind of stumped figured I would make a post to see if anyone can help here is a video thanks 
 

 

Edited by lukesmechanics1969
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