VGT% hitting max / min - Replace?
Thread Starter
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Laughing Gas
Joined: Mar 2012
Posts: 1,052
Likes: 28
From: Portal, AZ
VGT% hitting max / min - Replace?
early 04 with 06 engine dunno the PCM strategy
Long and short of it is I was sitting in my truck answering emails before I took off for home and noticed my VGT% at 14.7 concerned I stared at it for a bit and noticed it was jumping from 14.7 - 85.3 did this a few times then settled into its (my trucks) normal range at idle 50-60%
It drove home fine... great boost 23 max on the logs no issues at all
is this a sign of the VGT solenoid going out or is that just the vanes sweeping?
Long and short of it is I was sitting in my truck answering emails before I took off for home and noticed my VGT% at 14.7 concerned I stared at it for a bit and noticed it was jumping from 14.7 - 85.3 did this a few times then settled into its (my trucks) normal range at idle 50-60%
It drove home fine... great boost 23 max on the logs no issues at all
is this a sign of the VGT solenoid going out or is that just the vanes sweeping?
Elder User
Joined: May 2010
Posts: 691
Likes: 0
From: Ohio
early 04 with 06 engine dunno the PCM strategy
Long and short of it is I was sitting in my truck answering emails before I took off for home and noticed my VGT% at 14.7 concerned I stared at it for a bit and noticed it was jumping from 14.7 - 85.3 did this a few times then settled into its (my trucks) normal range at idle 50-60%
It drove home fine... great boost 23 max on the logs no issues at all
is this a sign of the VGT solenoid going out or is that just the vanes sweeping?
Long and short of it is I was sitting in my truck answering emails before I took off for home and noticed my VGT% at 14.7 concerned I stared at it for a bit and noticed it was jumping from 14.7 - 85.3 did this a few times then settled into its (my trucks) normal range at idle 50-60%
It drove home fine... great boost 23 max on the logs no issues at all
is this a sign of the VGT solenoid going out or is that just the vanes sweeping?
Elder User
Joined: Oct 2014
Posts: 970
Likes: 1
From: Marietta, GA
when its doing it, hold the brake and barley tap the gas. it should spool back up because it thinks your about take off.
van sweep should step up and back down gradually. should not go straight from min to max.
van sweep should step up and back down gradually. should not go straight from min to max.
Thread Starter
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Laughing Gas
Joined: Mar 2012
Posts: 1,052
Likes: 28
From: Portal, AZ
It was sorta gradual 14 - 40 - 65 - 85 but rather quickly
Fleet Mechanic
Joined: Jul 2013
Posts: 1,330
Likes: 65
From: 'Pitlock, Maine
....sort of, does this mean his turbo is working properly? or just the PCM tell it what it wants it to do?
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
It's the PCM telling the turbo what it wants the turbo to do.
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Fleet Mechanic
Joined: Jul 2013
Posts: 1,330
Likes: 65
From: 'Pitlock, Maine
Even though this plays into the OP's problem/question.....If we hear the engine changing tone/sound as this happens does that mean the VGT is actually doing what it's suppose to? I ask because mine does the same thing the OP said his was doing albeit a little slower and I do hear the engine changing tone as it is doing it.
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Laughing Gas
Joined: Mar 2012
Posts: 1,052
Likes: 28
From: Portal, AZ
I did notice minor changes in boost when it was happening -.1 to .5 at idle so I figured it was actually working vs just being commanded. I just wasn't sure if it was supposed to go to max / min like that.
it is cool to know that they (solenoid and turbo) are working right, the rest of the engine is kicking *** too. to the point that my paranoia is fading away. A few more things to do with the axles / hubs and she'll be at 100%
it is cool to know that they (solenoid and turbo) are working right, the rest of the engine is kicking *** too. to the point that my paranoia is fading away. A few more things to do with the axles / hubs and she'll be at 100%
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