Diesel Engine Incorrect Calibration? N212355140

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DuraYuk

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So, let's have a tutorial about emissions.....

1. GOVT isn't your friend
2. Corporations are after the bottom dollar, not your bottom dollar
3. #1&2 are in bed together. Corps being the little spoon
4. CAFE - corporate average fuel economy

Emissions are not your friend first off, driven by #1. There are different tiers and bins in said tiers. Based on HP ratings, displacement, GVW, and others determines what "bin" in the tier it has to achieve. At times there are "interim" calibrations that are allowed until finalized rules/regs are established.

After that is determined, a calibration is made to achieve said rating. CAFE is based on total vehicle sales and has to meet the standard. No auto maker knows what their number will be at the beginning of a year. They can project a number and base CAFE off historical data. NO automaker wants to give up CAFE credits for any reason if they don't have to. It's like their warm, fuzzy blanket for a rainy day.......so they keep them close.

This means that if they all of a sudden start selling the shit out of big vehicles and less little ones, their CAFE numbers will be off for that year. So, in order to satisfy their bed partner (govt/big oil), they would have to give up some of their precious CREDITS.......or they can do the govt/corporate thing and pass it along to the end user. Hence "revised" calibrations that allow them to satisfy their bin requirements for their CAFE requirements after the fact.

Lastly, emissions are driven by uneducated, corrupt govt peoples who have pockets lines by oil companies. In the guise of cleaner air, they will sell you something that uses more fuel to do the same amount of work. And for you diesel owners, they also get to sell you DEF which is a byproduct they didn’t have a huge market for before tier 4.

Follow the money, use common sense and you'll see the real story. If you think 26 - 30 mpg is good, you wouldn't believe what you could get with a motor calibrated for EFFICIENCY, not what the EPA says is clean.........2 VERY different things.

I hope this is less sensationalism. I can get out the crayons if needed.......
Cool story bro.
 

DuraYuk

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Y’all don’t have to believe me…
1. I reset my tripometer every fill up and check the average mpg. Before the recall I was at 21mpg now 18mpg. Most of my torque was at 1700-2400rpm…now it is much higher. I made an account to warn y’all not be a troll.
That's cool. So the 23s are immune ? They just want the 21 and 22s to get worse gas mileage and make less torque ? Smh.
 

B-train

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Don't worry, your '23 will have its chance for a running change to be rolled out. Still got some time to enjoy all the torque you speak of.
 

Zkeegan4

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That's cool. So the 23s are immune ? They just want the 21 and 22s to get worse gas mileage and make less torque ? Smh.
No, maybe your 23 could be running Better and you don’t know any different
 

DuraYuk

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No, maybe your 23 could be running Better and you don’t know any different
The tsb only covers 21 and 22. So the conspiracy theory you guys are pushing doesn't make sense.

Sall good tho. Do you lol.
 

Zkeegan4

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The tsb only covers 21 and 22. So the conspiracy theory you guys are pushing doesn't make sense.

Sall good tho. Do you lol.
Again, I have no reason to lie. It’s noticeably shittier. So much so I’m attempting to get it reflashed back. But clearly you know everything
 

DuraYuk

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Again, I have no reason to lie. It’s noticeably shittier. So much so I’m attempting to get it reflashed back. But clearly you know everything
Im saying don't put the emphasis on the flash. Could be a coincidence.
 

Jellyfrosh

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Mine has been to the dealers multiple times for various reasons, including in the last month. Nothing has been reprogrammed and it runs great as it always has. Never heard of this "recalibration"

Exactly the same case here.
 

Frank88

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My dealer wants to do this update on Friday. Has only one person reported on it so far? Unless I find another person complaining about it, I will have it done. Also, I just realized there might be some 'relearn' after the update. So performance may suck for a couple hundred miles and then go back to normal. I'll ask the dealer if they have any more info but I doubt they will have an clue. Techs just hit the buttons. I'll report back my findings.

Zkeegan4, how are you faring? Is the performance still bad? Did they reflash back to an older version?
 

StephenPT

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My dealer wants to do this update on Friday. Has only one person reported on it so far? Unless I find another person complaining about it, I will have it done. Also, I just realized there might be some 'relearn' after the update. So performance may suck for a couple hundred miles and then go back to normal. I'll ask the dealer if they have any more info but I doubt they will have an clue. Techs just hit the buttons. I'll report back my findings.

Zkeegan4, how are you faring? Is the performance still bad? Did they reflash back to an older version?
Though not specifically mentioned, in this thread another person reported MPG change after visiting the dealer - https://www.tahoeyukonforum.com/thr...fter-maintenance-and-software-upgrade.139668/ - however the follow-up is that it seems to be better and the only thing noticed was the range/mpg read-out was lower than normal. Nobody has shown hand-calcs of fuel economy to show that this revised calibration actually decreases fuel economy.
 

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