Vgt issue

97BambiBasherPSD · Jul 24, 2013

So when I first fire it up I don't hear the whistle at all. (Straight piped) ill get going and then ill feel the turbo kick in and the whistle is back. If I let it idle for a short period of time the whistle goes away and loss of power is present again. Start driving it all comes right back. I can sit and power brake it and then it'll start whistling again. If I get on it hard up a hill it'll work find till I let off then the turbo stops for a short time then comes back. It's an 04 btw. I'm stumped as to what the issue is. Thanks guess

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Lassie · Jul 24, 2013

Is this something that has recently changed? Did it whistle at idle before this with no other changes? If so, start by checking EBP and MAP sensors with KOEO and running. Also, cycle the VGT through its full range at idle and make sure its moving freely.

97BambiBasherPSD · Jul 24, 2013

when it started doing this the map sensor line blew off but i have since put that back on. i didnt know if it was coking up or the solenoid wasnt wroking right or what nothow do i cycle the vgt?

Lassie · Jul 25, 2013

Do you have AE or other diag tool? They can cycle the IPR by changing duty cycle. Turbo veins are probably sticking, but I would check out MAP and EBP sensor and EBP tube first, if you have a way.

97BambiBasherPSD · Jul 25, 2013

I'm getting an SCT here soon but other than that just a scan gauge. And it seems to not want to work with my 6.0.

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Jeremysmith9902 · Jul 25, 2013

did you go bigger with your exhaust? cause when i went to a 5 from a 3" it didnt whistle nearly as loud at an idle as it used to..

Lassie · Jul 25, 2013

Lassie said:
Do you have AE or other diag tool? They can cycle the IPR by changing duty cycle. Turbo veins are probably sticking, but I would check out MAP and EBP sensor and EBP tube first, if you have a way.

Edit: VGT not IPR

florida 6.0 · Jul 25, 2013

Sounds like the turbo needs cleaned . Sticking veins act like you described .

97BambiBasherPSD · Jul 25, 2013

Jeremysmith you can feel a power difference cause it feels like the map sensor isn't hooked up then it kicks in all of a sudden.

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97BambiBasherPSD · Jul 25, 2013

Florida that's kinda what I was fearing. How can you clean them?

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florida 6.0 · Jul 25, 2013

Youtube has some nice vids to walk you through it . Lots of patience . Its not hard just time consuming .

Cold Roller · Jul 25, 2013

Also check your hose to the MAP sensor is not cracked, nor any leaks on the comp side. As well, have a good look at all exhaust components from the heads to the turbo. In any case, you will have good access to all the components when you take the turbo out to clean it.

97BambiBasherPSD · Jul 26, 2013

Coal- I put a new hose on it so that shouldn't be cracked. Ill definitely have to look around some.

Now my buddy has a reman one off an 03 that's never been ran. Would that be worth it enough just to put on instead of cleaning mine?

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