Why does my truck not smoke?

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#46

07-08-2010, 09:08 PM

tdpower

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Quote:

Originally Posted by WilsonTaylor

I did not hear mine chirp like the video, but the boost does drop off dramatically. I did not keep trying to build boost when it happened though. Turbo surge is caused by the boost being forced back through the intake side of the turbo, isn't it?

I think that is more turbo flutter which is more on a 6.0 with an aftermarket air intake. On the 7.3 it is because the compressor wheel stalls out.

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#47

07-08-2010, 10:19 PM

PaysonPSD

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Wilson,

That loss of boost is probably the PCM de-fueling when it sees about 22-24 PSI of boost.

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#48

07-09-2010, 12:53 AM

CSIPSD

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I would hope not with the codes tunes he is running...

But none the less, your not hearing surge, but turbo stall, two completely differant things.

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#49

07-09-2010, 06:09 AM

WilsonTaylor

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Quote:

Originally Posted by PaysonPSD

Wilson,

That loss of boost is probably the PCM de-fueling when it sees about 22-24 PSI of boost.

I would question this since it happens at about 18 PSI if I move into it slowly instead of WOT. Does the PCM de-fuel fast enough to bring the boost down to 4 or 5 in the blink of an eye?

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#50

07-09-2010, 11:02 AM

CSIPSD

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Quote:

Originally Posted by WilsonTaylor

I would question this since it happens at about 18 PSI if I move into it slowly instead of WOT. Does the PCM de-fuel fast enough to bring the boost down to 4 or 5 in the blink of an eye?

Sounds to me like you have a boost leak, a boot that is not fully clamped... There is no way your boost should go from 18 to 4-5 without you lifting the throttle or the truck shifting.

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#51

07-09-2010, 08:39 PM

WilsonTaylor

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I'll have to build a boost leak detector and see what I can find out.

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#52

09-11-2010, 12:48 AM

hgoody77

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Quote:

Originally Posted by tdpower

I think that is more turbo flutter which is more on a 6.0 with an aftermarket air intake. On the 7.3 it is because the compressor wheel stalls out.

So is that turbo flutter a bad thing? need to install a different wheel?
mine does that ever since i installed the 6637 open filter and such. or atleast thats when i heard it clearly.

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