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Old 03-06-2010, 06:09 AM
th3 th3 is offline
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vgts problem?

since i installed a turbo back straight pipe i can hear every noise the turdo makes. i noticed that when i come to a red light i can hear the turbo cycle on and off. the turbo will stop whining and the exhaust rumble will take over then after several seconds the exhaust rumble will stop and the turbo will spool back up. if i sit long enough it will do this several times. i thought the turbo is supposed to keep a steady spool at idle. do i have a solenoid problem?
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Old 03-06-2010, 06:21 AM
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Mine does the same thing it
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Old 03-06-2010, 10:16 AM
th3 th3 is offline
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yours does the same thing because its normal for a 6.0 or because yours has the same problem mine has?
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Old 03-06-2010, 10:33 AM
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My 05 does the same thing, didnt notice it until i recently got it reflashed. It could be a vane sweep??
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Old 03-06-2010, 11:20 AM
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Yes, this is a normal condition for a 6.0. the vanes are sweeping to increase exhaust back pressure during an egr cycle, among other things.
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Old 03-06-2010, 11:43 AM
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Quote:
Originally Posted by DanTech_Offroad View Post
My 05 does the same thing, didnt notice it until i recently got it reflashed. It could be a vane sweep??
Yes, you are correct SIR. The latest PCM calibration has the VGT doing a "full sweep" if left idling long enough to prevent the vanes from sticking to the housing.
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Old 03-06-2010, 02:06 PM
th3 th3 is offline
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good deal, thanks guys! i figured i had another problem.
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