HELP AGAIN
#31
05-25-2012, 06:22 PM
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#32
05-25-2012, 06:25 PM
In other words, the PCM can command what duty cycle it wants the VGT to do, doesn't mean its actually doing it, nor is there a position sensor inside it (and PID to monitor), just like the IPR.
For what it's worth, I find it hard to believe the OP can't get his hands on another truck with a known good VGT to borrow. These trucks are a dime a dozen, so finding another one shouldn't be difficult. I'm just trying to help save some of his money before he goes out and either blows money on a turbo needlessly (or wastes the time in the labour needed to R & R the turbo for cleaning needlessly), or blows money on the pricey VGT solenoid without first pinpointing his issue.
Monitoring MAP and BARO (no EBP on 2003s) at key-on/engine-off will only tell him if he has any biased sensors, which I'm sure he's likely already done by now. Now he needs to find out WHY he's not boosting. I'll assume he has no exhaust or intake leaks or restrictions, now it's time to pinpoint the faulty turbo component(s).
#33
05-25-2012, 07:22 PM
VGT is only an actuator. There is no sensor to indicate the actual position on the VGT itself, other than to monitor how MGP (manifold gauge pressure) with the engine running at 1200 RPMs and active command of VGT duty cycle between 0% to 85%. In a normally functioning turbo, a steady increase should be observed when VGT is increased as 85% is approached (along with the turbo spool up).
In other words, the PCM can command what duty cycle it wants the VGT to do, doesn't mean its actually doing it, nor is there a position sensor inside it (and PID to monitor), just like the IPR.).
In other words, the PCM can command what duty cycle it wants the VGT to do, doesn't mean its actually doing it, nor is there a position sensor inside it (and PID to monitor), just like the IPR.).
Mike Im right with you on the Actuator/s in the 6.0L Just Cuz it says VGT% is in one position Dont Mean its in that position Gotcha
Im Aware of the Special Diagnostic tool you guys use to Measure the actual turbo Piston Movement as you command with IDS
Mike can you tell me about the CAM Follower at the end the VGT Valve what does it do Exactly??????????
Does it just hold the piston in the Parked position or ???? Iv read and reread the turbo charger guide on this and just cant get it in my head exactly what this CAM FOLLOWER at the end of the VGTCV purpous is
School me/us on this Thanks
Now the Other Day Another guy had come here and his VGT% was stuck at 85% at all times and wouldnt Boost Well everything else checked out ok so replaced VGT and problem solved IDK maybe got Lucky
Monitoring MAP and BARO (no EBP on 2003s) at key-on/engine-off will only tell him if he has any biased sensors, which I'm sure he's likely already done by now. Now he needs to find out WHY he's not boosting. I'll assume he has no exhaust or intake leaks or restrictions, now it's time to pinpoint the faulty turbo component(s).
I dont think he has checked any of these yet
He said he has a CTS programmer IDK if its got gauges to or not I dont follow that stuff so I really dont know what a CTS even is Im assuming an EDGE Product but IDK for shure
#34
05-25-2012, 07:47 PM
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Mike Im right with you on the Actuator/s in the 6.0L Just Cuz it says VGT% is in one position Dont Mean its in that position Gotcha
Im Aware of the Special Diagnostic tool you guys use to Measure the actual turbo Piston Movement as you command with IDS
Mike can you tell me about the CAM Follower at the end the VGT Valve what does it do Exactly??????????
School me on this Thanks
Now the Other Day Another guy had come here and his VGT% was stuck at 85% at all times and wouldnt Boost Well everything else checked out ok so replaced VGT and problem solved IDK maybe got Lucky
It is a edge product. It has some gauges but not those
I dont think he has checked any of these yet
He said he has a CTS programmer IDK if its got gauges to or not I dont follow that stuff so I really dont know what a CTS even is Im assuming an EDGE Product but IDK for shure
Im Aware of the Special Diagnostic tool you guys use to Measure the actual turbo Piston Movement as you command with IDS
Mike can you tell me about the CAM Follower at the end the VGT Valve what does it do Exactly??????????
School me on this Thanks
Now the Other Day Another guy had come here and his VGT% was stuck at 85% at all times and wouldnt Boost Well everything else checked out ok so replaced VGT and problem solved IDK maybe got Lucky
It is a edge product. It has some gauges but not those
I dont think he has checked any of these yet
He said he has a CTS programmer IDK if its got gauges to or not I dont follow that stuff so I really dont know what a CTS even is Im assuming an EDGE Product but IDK for shure
It is an edge product. It has some gauges but I don't think it has those
#35
05-25-2012, 10:18 PM
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#36
05-26-2012, 01:06 AM
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#37
05-26-2012, 11:01 AM
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#38
05-26-2012, 11:05 AM
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#39
05-26-2012, 09:35 PM
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#41
05-26-2012, 09:50 PM
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05-26-2012, 11:08 PM
#43
05-26-2012, 11:10 PM
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#45
05-26-2012, 11:17 PM
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