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Valve knock?

jlb0716

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Ok so when I'm accelerating at low rpms the motor has a very distinct knocking/rattling sound. I think it is valve knock but I'm not sure. Could it be due to the timing being off? What can I do to fix this noise. And could the lean condition in my engine be contributing to this?
 


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Beanmachine7000

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Sounds like detonation... Downshift...
 

jlb0716

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It just recently started making this noise.I've owned this truck since '03 and never had this issue...something isn't right...i know it isn't my driving.
 

Beanmachine7000

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99% sure it is detonation... Low RPM's/high load, usually means detonation, doesn't matter if it just started it or not... You might have gotten a bad batch of gas or some excess carbon build up... DOWNSHIFT ;) Run a can of Seafoam through it if you feel like you need to do something about it...
 

jlb0716

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fixed this situation by making a modification to my intake and reincorporating the stock MAF adapter back in line with the system.
 

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