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 > Duramax Turbo adventure conclusion

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MNRon

Tennessee

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Posted: 07/22/21 12:56pm Link  |  Quote  |  Print  |  Notify Moderator

I posted about a Duramax Turbo problem starting around 125,000miles setting the CEL and even going into limp mode when pulling a 16,000lb 5er. Conclusion a couple years ago was it *might* need a new turbo. It was sporatic though and seemed to ‘go away.’

I created a follow up post a month ago communicating that I spent $3500 to replace the turbo at about 150,000mi last winter expecting that that would resolve this intermittent problem; and that unfortunately I was experiencing the same problem of throwing the CEL and going into limp mode pulling 16,000 through the mountains again. Got some suggestions, but this thread was eventually closed down as some took it way off topic.

The purpose of this post is to communicate the *final* fix for this issue (hopefully [emoticon]). A shop in Tacoma WA replaced the MAP sensor at about 158,000 miles a few weeks ago. Since then I’ve driven 4K+ miles including pulling over several passes (this morning just came over 8600ft I80 pass by Cheyenne WY). Replacing the MAP sensor seems to have resolved this issue. Wish I had tried that a couple years and $3500 ago…


Ron & Pat
2013 Silverado 3500 Duramax SRW
2019 VanLeigh Vilano 320 GK

Lwiddis

Near DVNP, California

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Posted: 07/22/21 02:18pm Link  |  Quote  |  Print  |  Notify Moderator

Glad it appears finally fixed.


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, 300 watt solar-Lossigy 200 AMP Lithium battery. TALL flag pole. Prefer boondocking, USFS, COE, BLM, NPS, TVA, state camps. Bicyclist 14 yr. Army -11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad


Tyler0215

Iowa

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Posted: 07/22/21 03:26pm Link  |  Quote  |  Print  |  Notify Moderator

Loading the parts cannon without proper diagnostics is always expensive.

S Davis

Western WA

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Posted: 07/22/21 04:16pm Link  |  Quote  |  Print  |  Notify Moderator

It sounded like a ECM issue or something not turbo related in your other thread, glad you got it figured out. I would advise getting a monitor like a Edge insight or similar, you can monitor just about everything under the hood as well as pull and clear codes. Really helps as you can monitor real time when the issue is happening.

S Davis

Western WA

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Posted: 07/22/21 06:14pm Link  |  Quote  |  Print  |  Notify Moderator

I was having fuel pressure codes setting on my 09 duramax when the wife was drag racing it, I could put commanded fuel pressure and a actual and see the CP3 run out of steam, running 26000psi with 29000psi commanded on a full throttle pass. So on a turbo issue you could set up commanded vain position and boost and actual and if the turbo is doing as commanded you know it is fine.

#1Flyboy

California

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Posted: 07/22/21 06:54pm Link  |  Quote  |  Print  |  Notify Moderator

…….Tyler, yes….

LowRyter

OKC

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Posted: 07/22/21 08:00pm Link  |  Quote  |  Print  |  Notify Moderator

glad it was fixed


John L
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Nv Guy

Reno NV

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Posted: 07/22/21 08:47pm Link  |  Quote  |  Print  |  Notify Moderator

When I was doing maintenance purchasing for a trucking company, we had one tractor that would randomly lose power. No codes, no cel..just a complete lack of power. After several tows, lots of checking and rechecking, an ECM replacement we finally put our technical director in the truck with a laptop so he could monitor all the various sensors. Turned out the boost sensor would randomly drop out, so the ECM would cut fuel- resulting in no power. This taught me the value of a "flight recorder" so every sensor output can be reviewed.





Grit dog

Black Diamond, WA

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Posted: 07/22/21 11:18pm Link  |  Quote  |  Print  |  Notify Moderator

Post the name of the shop so we know who didn’t rip you off for another turbo, please.


2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
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Groover

Pulaski, TN

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Posted: 07/23/21 05:21am Link  |  Quote  |  Print  |  Notify Moderator

Glad that you got if fixed. It really is appalling to me that vehicles don't come with good on-board diagnostics and meaningful error messages.

I used to work with CNC machines. One brand had excellent error messages that you could generally take to the bank as to what the problem was and that was over 30 years ago. We had another brand (German made) that generally displayed error messages that were totally irrelevant. Trouble shooting was a nightmare. Guess which brand I only bought one of. Unfortunately in vehicles it seems like they are all equally bad.

I can sympathize with your problem. I recently had a problem with my truck that only revealed itself under heavy loads. You generally don't want to take a 16,000lb trailer with you to the mechanic but then the mechanic can't re-create the problem. I had another issue where the code would appear randomly but would clear itself before I could get to a dealer. The dealers refused to work on it without seeing the code for themselves. Both situations clearly call for better on-board diagnostics and that burden shouldn't be on the customer.

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