o6 duramax at idle it spools up and down sometimes is this normal...?

if its on high idle...yes
if not on high idle maybe, how much is it surging?

o6 duramax at idle it spools up and down sometimes is this normal...?
what kind of truck?
if its a vvt turbo its normal
ecm is finding home for vanes

its a 2006 2500 max lly ...everythings stock but the exhaust it doesn't do it all the time just once and a wile on normal low idle. thanks

Mine does it, normal, dynarex is correct.

thanks for replying just something that i have been noticing on the truck...

Yep, just the vanes cycling. Completely normal.

thanks josh figured it might be cuz i heard other trucks do the same but didnt know for sure thanks again

when I first fire it up the turbo does a few different tests, you'll hear it if your exhaust isn't stock, everyone always says "whoah, what did your truck just do"?

when I first fire it up the turbo does a few different tests, you'll hear it if your exhaust isn't stock, everyone always says "whoah, what did your truck just do"?


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I never heard mine until I changed the exhaust

Yes, goes from rub-rub-rub to pshhhhhhhhhh. My dad says to me: "What the hell is wrong with that thing?"

lol yea...looks on faces are very interesting...it is really interesting on my lbz that i changed the vane positions to sound like an lb7 and its deep and then WHOOOOOOOOOSSSHHHH lol

I've been wondering the same thing. A buddy of mine has an 05 LLY with the edge and 5" exhaust and his does the same thing. It actually makes a sound once he turns it off. I was one of those people with the weird look on their face the first time i heard it. haha

It actually makes a sound once he turns it off.That's probably the turbo spooling down that you're hearing at shutdown.

The reason you can't hear it with a stock exhaust is because it is muffled by the cat and stock muffler.

That's probably the turbo spooling down that you're hearing at shutdown.

The reason you can't hear it with a stock exhaust is because it is muffled by the cat and stock muffler.

Well I guess it's time to straight pipe it. :ro)

It's nice having a very quite truck.......sometimes. Althought it does suck that you can't even hear it running from 10 foot away.

[quote=06 rich;2224000]o6 duramax at idle it spools up and down sometimes is this normal...?[/quote
i dont know mine does the same thing

Yeah, most people are like WTF when they hear it. HAHA.

everything you guys said is true. . . having a 5inch on it you can really tell compared to the stock stuff. i do like the looks on peoples' faces when it cycles. thanks guys for repling

everything you guys said is true. . . having a 5inch on it you can really tell compared to the stock stuff. i do like the looks on peoples' faces when it cycles. thanks guys for repling


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