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C43 AMG '17 makes 3/4 of the Boost

Old Jun 26, 2023 | 08:01 AM
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C43 AMG '17 / Stage II
C43 AMG '17 makes 3/4 of the Boost

Hello everybody

I didn't found any similar problem as mine, so the car is remapped have downpipes and bms intake

The car was updated in MB dealer - the update is on the ECU and TCU, then I went back to my mapper and he remapped it again

And i spot the car is not strong as before and notice the boost on the amg screen is hit up to 3/4 and can't make the full boost

The car doesn't have boost leak also no errors on scan

Does someone knows if there's chance the CPC module to be updated or the TCU update to have some restriction on the torque and that's why to not go full boost

Also i checked the Engine menu on the middle screen the car hits full kW and Torque

Please check the Video as well

Thanks

Last edited by KristiyanPetrov; Jun 26, 2023 at 08:40 AM.
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Old Jun 26, 2023 | 03:47 PM
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Amg C43
I’m sure I’ve read on here before that our in car gauges only read “ function” correctly when the car is stock.
I believe someone said they don’t really measure anything they react with a reading that corresponds to what the computer is telling the car

I do believe there is boost & tq limiters
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Old Jun 26, 2023 | 04:14 PM
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C43 AMG '17 / Stage II
Originally Posted by MaverickC43
I’m sure I’ve read on here before that our in car gauges only read “ function” correctly when the car is stock.
I believe someone said they don’t really measure anything they react with a reading that corresponds to what the computer is telling the car

I do believe there is boost & tq limiters
Before the update from the dealer my car was with same remap and the car was showing correctly the boost and was bit more powerful than now

P.S. Also I heard earlier my car doesn't have CPC because is 2017, FL and above have CPC from what I understood
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Old Jun 28, 2023 | 07:37 PM
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Originally Posted by kistiyanpetrov
Hello everybody

I didn't found any similar problem as mine, so the car is remapped have downpipes and bms intake

The car was updated in MB dealer - the update is on the ECU and TCU, then I went back to my mapper and he remapped it again

And i spot the car is not strong as before and notice the boost on the amg screen is hit up to 3/4 and can't make the full boost

The car doesn't have boost leak also no errors on scan

Does someone knows if there's chance the CPC module to be updated or the TCU update to have some restriction on the torque and that's why to not go full boost

Also i checked the Engine menu on the middle screen the car hits full kW and Torque

Please check the Video as well

Thanks
https://mbworld.org/forums/c63-c63s-...ml#post8627582
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Old Jun 28, 2023 | 07:38 PM
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never mind you replied to that thread already, ignore the previous post.
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Old Jul 7, 2023 | 11:04 AM
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Car fixed yet?
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Old Jul 10, 2023 | 11:50 AM
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C43 AMG '17 / Stage II
I already sent you PM with details but long story short, the car can't do more than 1bar for some reason, no leaks, errors etc. Not sure if this is related to the update on TCU from MB last month and they did some torque limit to not have this jerky shifts on low gears on S+

For now that's the update, if I found why the car not able to do more than 1bar will let know here as well
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Old Jul 10, 2023 | 12:22 PM
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Originally Posted by kistiyanpetrov
I already sent you PM with details but long story short, the car can't do more than 1bar for some reason, no leaks, errors etc. Not sure if this is related to the update on TCU from MB last month and they did some torque limit to not have this jerky shifts on low gears on S+

For now that's the update, if I found why the car not able to do more than 1bar will let know here as well
Saw the PM but sounds like there is a happy ending with your tuner figuring something out?
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Old Jul 10, 2023 | 05:35 PM
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C43 AMG '17 / Stage II
Originally Posted by W205C43PFL
Saw the PM but sounds like there is a happy ending with your tuner figuring something out?
So far yes, if I understood why the car is not able to do full boost will be more than happy
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Old Jul 10, 2023 | 09:20 PM
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Originally Posted by kistiyanpetrov
So far yes, if I understood why the car is not able to do full boost will be more than happy
Good luck.
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