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  #1  
Old 02-13-2012, 05:04 PM
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Turbo Surge

So today I noticed my turbo surging, pretty badly. When I put the go pedal to the floor it shoots up to about 22 psi, then fluctuates between there and like 5 psi, back and forth constantly the whole my foot is in. Also cruising down the interstate at about 65 - 70 mph, same scenario, but only goes up to about 15 psi with my cruise set, and down to basically 0, and back up again constantly. I did notice when I was cruising at only 55-60 mph, it still does it but not as bad and not as often. Seems to be the worst during acceleration, up to 45 mph, then cruising 65 and up. Just cleaned my turbo and turbo boots about a month ago during an egr delete, everything has been fine til now. Any ideas are appreciated.

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Old 02-14-2012, 05:04 AM
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Any ideas? Is it ok to drive like this?

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Old 02-15-2012, 05:12 PM
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I just went out and visually checked all my connections, and turbo boots, exhaust connections, everything. Only one I actually disconnected was the passenger side turbo boot that hooks directly to the turbo and the intake hose from the air filter. Got under looked for signs of leaks, etc. Didn't see any soot nor do I hear any leaking, put it back together and now it seems worse only building about 18 psi right after take off, after it shifts onto second it goes down and won't build up past like 5 psi from that point. Thinkin my turbo is toast?

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Old 02-15-2012, 05:49 PM
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I would suspect the vgt solenoid
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Old 02-15-2012, 05:56 PM
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Either vgt solenoid as mentioned or a worn/dirty turbo. The hole that the vgt solenoid hooks to could be worn elongated.
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Old 02-15-2012, 06:48 PM
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Any way to check the vgt solenoid? And I just cleaned my turbo

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Old 02-15-2012, 07:00 PM
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Also should I get a code or any other symptoms with a bad vgt solenoid, smoke or anything?

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Old 02-15-2012, 07:54 PM
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I read on another thread that if I was to unplug the vgt with engine running and plug it back in then I should hear a change in the engine sound if the solenoid is good. Is this correct? If so, I did this and if that is right then my solenoid is good. Also just noticed that may scangauge is giving a -.1 to -.2 boost at idle, don't think its ever done that before?

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Old 02-16-2012, 03:32 PM
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Quote:
Originally Posted by 06kngrnch84 View Post
I read on another thread that if I was to unplug the vgt with engine running and plug it back in then I should hear a change in the engine sound if the solenoid is good. Is this correct? If so, I did this and if that is right then my solenoid is good.
That doesn't mean anything. It means your turbo vanes are free at the exact instant you just checked it. When you're going down the road it could be a whole different story
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Old 02-16-2012, 03:41 PM
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Quote:
Originally Posted by sinner6.0L View Post
That doesn't mean anything. It means your turbo vanes are free at the exact instant you just checked it. When you're going down the road it could be a whole different story
Ok, so anyway to check it? Also the truck threw a P0299 code

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