Turbo Sticking (Help)
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7th Gear
Joined: Mar 2023
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Likes: 2
Turbo Sticking (Help)
Hey everyone, I have 2004 F350 with 61k miles.
I noticed my turbo started sticking so I pulled it off, cleaned it really well everything was moving properly. Put turbo back on and it seems to work good until it gets warmed up and then above 50mph it’s sticking still. Once it warms up even going slower through town it wants to stick open or closed. I took the turbo back off and everything is moving really good, besides the VGT is fairly hard to move back and forth. I’m not sure how easy or hard it is supposed to be so I’m not sure how to compare. Does this warrant a new turbo or is there something else im missing? Pulled codes with Forscan and only code I’m getting is P0299 turbocharger underboost. Also should note that when I took the turbo off this last time it was very black and dirty inside it. Not sure if that is because it was sticking but thought I would mention it. Hopefully someone can give me some insight and I can buy a new turbo knowing it’s going to fix it. Thanks in advance everyone!
I noticed my turbo started sticking so I pulled it off, cleaned it really well everything was moving properly. Put turbo back on and it seems to work good until it gets warmed up and then above 50mph it’s sticking still. Once it warms up even going slower through town it wants to stick open or closed. I took the turbo back off and everything is moving really good, besides the VGT is fairly hard to move back and forth. I’m not sure how easy or hard it is supposed to be so I’m not sure how to compare. Does this warrant a new turbo or is there something else im missing? Pulled codes with Forscan and only code I’m getting is P0299 turbocharger underboost. Also should note that when I took the turbo off this last time it was very black and dirty inside it. Not sure if that is because it was sticking but thought I would mention it. Hopefully someone can give me some insight and I can buy a new turbo knowing it’s going to fix it. Thanks in advance everyone!
Logistics Pro
Joined: May 2004
Posts: 3,613
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I am going to assume you put the turbo back together correctly so.....
Check and make sure the valve wiring and plug are good on the VGT solenoid.
Have you checked your EBP sensor and tube for clogging? The valve and tube are located left side toward the front of the head, that can cause turbo issues IIRC.
Check and make sure the valve wiring and plug are good on the VGT solenoid.
Have you checked your EBP sensor and tube for clogging? The valve and tube are located left side toward the front of the head, that can cause turbo issues IIRC.
Thread Starter
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7th Gear
Joined: Mar 2023
Posts: 7
Likes: 2
I am going to assume you put the turbo back together correctly so.....
Check and make sure the valve wiring and plug are good on the VGT solenoid.
Have you checked your EBP sensor and tube for clogging? The valve and tube are located left side toward the front of the head, that can cause turbo issues IIRC.
Check and make sure the valve wiring and plug are good on the VGT solenoid.
Have you checked your EBP sensor and tube for clogging? The valve and tube are located left side toward the front of the head, that can cause turbo issues IIRC.
Logistics Pro
Joined: May 2004
Posts: 3,613
Likes: 883
I had an instance where the MAF sensor plug (main air sensor after air filter) was not plugged in fully and was messing with my turbo on a trip. SInce I am sure that boot came off duting disassembly it is an option to check also.
Let us know what oyu find, I am sure other will be around soon to chip in
Let us know what oyu find, I am sure other will be around soon to chip in
Fleet Mechanic
Joined: Sep 2006
Posts: 1,491
Likes: 295
From: Fresno, CA
How are you determining it's sticking? Usually indicated by watching VGT% and it will go all the way one or the other (15 or 85%).
Post the symptoms you're seeing, it might be something else.
Post the symptoms you're seeing, it might be something else.
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7th Gear
Joined: Mar 2023
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yes that’s exactly what I was using, I was using my SCTX4 for VGT readings, then to double check I hooked up forscan on windows and also had the same result. Worked great in town, got up over 50mph and would stick 85 or 15 and then coming back into town it would always be stuck at either 85 or 15. Never got stuck on middle percentages. Also had a bunch of other readings on forscan with no issues or faults detected.
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Fleet Owner
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Just be aware that the VGT duty cycle is a command only. It does not tell you what the VGT solenoid is actually doing - only what the PCM wants it to do.
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7th Gear
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yeah that’s actually the exact video I watched as I cleaned it. Veins and unison ring move extremely well. VGT **** seems to be harder but not sure. What do you mean by pressure the turbo is putting out? Boost psi? 24-26 if I remember correctly.
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7th Gear
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that’s what I’m worried about that it isn’t the turbo but something else but not sure how to look into that. But I will say; when the VGT was saying it was sticking, I could tell something was going on before even looking to see if it was sticking. I’m fine with buying a new turbo but don’t want to be back at square one if nothing changes.
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7th Gear
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Im not sure actually. But when I notice it sticking it seems like it just won’t build boost I get into it and it takes forever then it finally starts building slowly before it finally goes. Takes extra long to build. Would all the black dirtiness inside the turbo be from it sticking open/closed??
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7th Gear
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Hey everyone, I have 2004 F350 with 61k miles.
I noticed my turbo started sticking so I pulled it off, cleaned it really well everything was moving properly. Put turbo back on and it seems to work good until it gets warmed up and then above 50mph it’s sticking still. Once it warms up even going slower through town it wants to stick open or closed. I took the turbo back off and everything is moving really good, besides the VGT is fairly hard to move back and forth. I’m not sure how easy or hard it is supposed to be so I’m not sure how to compare. Does this warrant a new turbo or is there something else im missing? Pulled codes with Forscan and only code I’m getting is P0299 turbocharger underboost. Also should note that when I took the turbo off this last time it was very black and dirty inside it. Not sure if that is because it was sticking but thought I would mention it. Hopefully someone can give me some insight and I can buy a new turbo knowing it’s going to fix it. Thanks in advance everyone!
I noticed my turbo started sticking so I pulled it off, cleaned it really well everything was moving properly. Put turbo back on and it seems to work good until it gets warmed up and then above 50mph it’s sticking still. Once it warms up even going slower through town it wants to stick open or closed. I took the turbo back off and everything is moving really good, besides the VGT is fairly hard to move back and forth. I’m not sure how easy or hard it is supposed to be so I’m not sure how to compare. Does this warrant a new turbo or is there something else im missing? Pulled codes with Forscan and only code I’m getting is P0299 turbocharger underboost. Also should note that when I took the turbo off this last time it was very black and dirty inside it. Not sure if that is because it was sticking but thought I would mention it. Hopefully someone can give me some insight and I can buy a new turbo knowing it’s going to fix it. Thanks in advance everyone!
Pictures of turbo when I took it off second time. If you look at turbine fins you can see where I cleaned off to show how black and dirty everything was.
7th Gear
Joined: May 2023
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From: Long live the south
I'm a Newbee to diesel world so take my opinion's with a grain of salt but the two pic of the trubo don't look that bad / dirty, and I would say that you may have a mechanical prob because you say you do feel a performance issue I would think it would be good to be monitoring the sensors while the malfunction is happening with forscan your map, ebp, baro, icp, icp v and ipr % I think I have that right, and see if the VGT commanded is going in lines with the sensor reading, yeah I know easier said then done 😂 , the p0299 with out other codes can be a bitch to track down but you do have other performance issues so that should help narrow it down. I have the p0299 & CEL and no perceptible power loss. can you swap out your vgt solenoid with a buddy's maybe?
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