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Discussion Starter #1
Hey guys, I have started noticing an odd engine noise. What I am winessing is that certain times under heavy exceleration the engine seems to sound like it is fluttering? Meaning the engine takes on a totally different sound than it normally has. In a way it sounds like it would be floating valves on a gas engine. The diesel doesnt loose power just gets louder and sounds like its fluttering. Anyone ever experienced this? If so let me know what is happening. Thanks!


01Duramax
 

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does the noise come in above 2600 rpm? Sounds very much to me like pilot injection is shutting down which is perfectly normal
 

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Mine did that off and on in the 8 to 10,000 range. Started using a fuel additive havent heard it since. I add 8 ounces of Shell Rotella DFA every tank; it keeps it quiet.
 

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Thanks guys for the input. I have to go with dmaxalliTech on the pilot injection. Yes it does it at higher RPM's. Thanks again guys.
 
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