New c63s underpowered...ecu run in mode?
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C63s
New c63s underpowered...ecu run in mode?
So first time I gave my c63s a bit of a foot and it was stopping dead on 300bhp and underpowered (I had a demo c63 for a month and it was way faster and went to 500bhp on reader)
I'm assuming the ecu had a run in mode that deletes after a certain millage?
I'm assuming the ecu had a run in mode that deletes after a certain millage?
Super Member
Joined: Jan 2016
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From: North NJ
2016 C63S
It shouldn't. Both mine and the test drive car both hit 503 hp the first trip out. These cars actually have a protection mode that will be activated but you would never know it. My friend had a similar issue and it turned out to be a defective exhaust flap motor. The car showed no CEL but just would not jump above 350hp.
See if you can get he car scanned for codes
See if you can get he car scanned for codes
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C63s
It shouldn't. Both mine and the test drive car both hit 503 hp the first trip out. These cars actually have a protection mode that will be activated but you would never know it. My friend had a similar issue and it turned out to be a defective exhaust flap motor. The car showed no CEL but just would not jump above 350hp.
See if you can get he car scanned for codes
See if you can get he car scanned for codes
could that have made the issue?
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Joined: Jul 2015
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From: SoCal
2016 C63S Sedan
Check to see if you have any turbo boost in the display ahead of the steering wheel (when you have no power) as I had this problem 3 times and the dealer said it was a turbo waste gate hose that they replaced and has not happened since.
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From: North NJ
2016 C63S
This is it 100%. If you override the valve controls the car goes into a "limp mode". The car thinks something is wrong with the exhaust and pulls all HP after about 4K rpm. You will prob notice that as well.
I am not sure if you can just flash the codes and make it work. But he went back to stock, cleared codes, and right back to normal.
Btw codes were P141100, P143700, P13c700. One for each valve in the exhaust
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C63s
Yes!
This is it 100%. If you override the valve controls the car goes into a "limp mode". The car thinks something is wrong with the exhaust and pulls all HP after about 4K rpm. You will prob notice that as well.
I am not sure if you can just flash the codes and make it work. But he went back to stock, cleared codes, and right back to normal.
Btw codes were P141100, P143700, P13c700. One for each valve in the exhaust
This is it 100%. If you override the valve controls the car goes into a "limp mode". The car thinks something is wrong with the exhaust and pulls all HP after about 4K rpm. You will prob notice that as well.
I am not sure if you can just flash the codes and make it work. But he went back to stock, cleared codes, and right back to normal.
Btw codes were P141100, P143700, P13c700. One for each valve in the exhaust
Facebook torqueflow and listen to it,rreally don't want to go back stock...
I've got msl to sponsor a remap as I'm doing the gumball rally in it.
I guess 3 options?
1. see if can delete codes and it fixes it
2. remap now
3. leave it limp mode while running in then remap (500 miles currently)
what you think best?
my merc dealer are custom friendly
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Posts: 537
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From: North NJ
2016 C63S
Is that your black coupe on the Facebook page? If so Very nice!
I would not leave it in limp mode. You don't want a brand new car breaking in with an issue like this. i would take it back to the exhaust company and see if they have a solution.
What exactly did they do? Remove the flaps or just give you something that forces the valves to be open at all times?
I would not leave it in limp mode. You don't want a brand new car breaking in with an issue like this. i would take it back to the exhaust company and see if they have a solution.
What exactly did they do? Remove the flaps or just give you something that forces the valves to be open at all times?
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Thread Starter
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C63s
Yes!
This is it 100%. If you override the valve controls the car goes into a "limp mode". The car thinks something is wrong with the exhaust and pulls all HP after about 4K rpm. You will prob notice that as well.
I am not sure if you can just flash the codes and make it work. But he went back to stock, cleared codes, and right back to normal.
Btw codes were P141100, P143700, P13c700. One for each valve in the exhaust
This is it 100%. If you override the valve controls the car goes into a "limp mode". The car thinks something is wrong with the exhaust and pulls all HP after about 4K rpm. You will prob notice that as well.
I am not sure if you can just flash the codes and make it work. But he went back to stock, cleared codes, and right back to normal.
Btw codes were P141100, P143700, P13c700. One for each valve in the exhaust
Is that your black coupe on the Facebook page? If so Very nice!
I would not leave it in limp mode. You don't want a brand new car breaking in with an issue like this. i would take it back to the exhaust company and see if they have a solution.
What exactly did they do? Remove the flaps or just give you something that forces the valves to be open at all times?
I would not leave it in limp mode. You don't want a brand new car breaking in with an issue like this. i would take it back to the exhaust company and see if they have a solution.
What exactly did they do? Remove the flaps or just give you something that forces the valves to be open at all times?
they deleted the back boxes and put custom straight pipes...
they are partnered with msl best merc tuning outlet in UK appaapparently so they're the ones talking to me now about fixing it, both companies in same garage...
they said bring it back and they will flash codes or remap.
my merc dealer has offered to check with tech if they can also flash codes for me...
so few options, guess if you advise no limp mode would be
1. get merc to flash codes see if it works
2. if not remap with msl
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Super Member
Joined: Jan 2016
Posts: 537
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From: North NJ
2016 C63S
I think if you get mercedes to flash/clear the codes they will just come back. The ecu is going to be searching for those valve motors and next time it does a "check up" you are going to get the same issue.
See if msl can come up with a solution. A simple temp fix(if they can't figure it out) would be to pull the motors of the stock piece. They are tiny so you may be able to plug them in and tuck them away under the car. Then have the codes clear and you should be fooling the ecu. That should buy some time(if you don't want to be limping around)
See if msl can come up with a solution. A simple temp fix(if they can't figure it out) would be to pull the motors of the stock piece. They are tiny so you may be able to plug them in and tuck them away under the car. Then have the codes clear and you should be fooling the ecu. That should buy some time(if you don't want to be limping around)
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Posts: 405
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From: NV
,
Was the oil temperature completely warmed up? I.E. the font display the oil temperature in the AMG menu turns from white to blue?
The computer seems to purposefully limit the engine before it reaches that point. That's the only thing I can think of.
The computer seems to purposefully limit the engine before it reaches that point. That's the only thing I can think of.
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C63s
yeh was an hour into a 2 hour drive when I had a play...
Thread Starter
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C63s
I think if you get mercedes to flash/clear the codes they will just come back. The ecu is going to be searching for those valve motors and next time it does a "check up" you are going to get the same issue.
See if msl can come up with a solution. A simple temp fix(if they can't figure it out) would be to pull the motors of the stock piece. They are tiny so you may be able to plug them in and tuck them away under the car. Then have the codes clear and you should be fooling the ecu. That should buy some time(if you don't want to be limping around)
See if msl can come up with a solution. A simple temp fix(if they can't figure it out) would be to pull the motors of the stock piece. They are tiny so you may be able to plug them in and tuck them away under the car. Then have the codes clear and you should be fooling the ecu. That should buy some time(if you don't want to be limping around)
Thread Starter
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C63s
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C63s
but as you can see, it didn't fool the ecu for long it seems!
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C63S
Did u get to the bottom of this issue?
