If it sounds like a can of marble balls rolling around in it
Then it's preignation due to carbon buildup. It happens when engine works hard. It could be reduced with higher octane gas. But the real cure is decarbon or swap to cold spark plugs. I did it and solved the engine pinging noise, the pre ignition issue, on my Infiniti years ago.
2017 F150 ， 5.0L ，V8，加大油门时，特别是上坡时， 会有哗啦哗啦的噪音。 请牛人解释一下什么原因？需要换什么？
有时候出保修期一点，Dealer会给很大的优惠。
你这个“哗啦哗啦”判断起来比较有挑战性。
二手车， 没买保修
类似铃声
Then it's preignation due to carbon buildup. It happens when engine works hard. It could be reduced with higher octane gas. But the real cure is decarbon or swap to cold spark plugs. I did it and solved the engine pinging noise, the pre ignition issue, on my Infiniti years ago.
https://www.ngk.com/what-is-a-spark-plugs-heat-range-2
https://youtube.com/shorts/nuic8MYiFi0
视频在这里, 前面不断地有噪音, 后面片刻消失, 因为已经上去坡