sebc63

Gotta 2011 c63. ECU and pulley done. Between 2nd and 3rd 80% throttle car goes into limp mode. (scary crap. had no place to pull over on the highway to restart the car).The tune i just had it done and they tried to retune it twice already and couldnt find a problem. Took it to the dealer and the computer read pedal sensor was bad. Anyone had similar problem??? was it the sensor or the tune???

emericr

Do a search, there is a long thread about this. No one has been able to pinpoint the exact cause yet.

Mort

Does the driver display say ESP not available?

Other members have reported this problem and replacing the pedal sensor has been the reported fix for a few of them. The tune has been suspected in others. Try a search as there have been several threads reported on this issue. There is a table in the tune that compares the rate of air volume change reported by the MAFs to an expected range. If it goes outside of the range the tune will put the engine performance into limp mode. This is partially to prevent run away acceleration in the case of a defective pedal sensor. It may be possible for a tune to exceed this range and if the table has not been properly modified then limp mode is a possibility. It may also be a torque limit in the tune that is being exceeded.

c32AMG-DTM

Which tune are you running?

sebc63

Evosport

sebc63

I did 5k miles stock, no problems... right after i tuned it the limp mode started. Brad from Evosport was helpfull and understanding in fixing this issue. They tried to redo the tune for me and the problem was still same. Now for 4 weeks I'm without the car and dont know what to do!!! The pedal sensor should come in tday. Hopefully that will fix it!!!!

BAD430BENZ

i guess the Evosport tune needs the " little blue pill " to keep from going into " limp mode "

brad @ evosport

Bad430Benz: lol, a little levity is always appreciated!

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sebc63:

Again, we will do anything possible to assist.

As I explained to you, we have a clk63BS shop car that has suffered from this for 6 months and has been at the dealer now for 6+ weeks. 2 pedals, countless harnesses, new TB, etc. They eventually found that the ECU harness had some loose connectors INTERNAL somewhere, and they are replacing the can bus harness complete as best I can tell. Same situation, the car ran great stock, once modded the issue presented itself and the issue stayed even when the car was back to stock. Very frustrating.

There are a number of threads on this site and others with this issue, I wish Mercedes would do a better job of documenting and linking these problem cars so there was a database to pull from to repair them! As we talked yesterday, please let me know when and how we can assist!

Thanks
Brad

FixDaBenz

Hey Brad and Seb. Pedal came in today. Installing it now. Like I told Seb I can only go what our computers are telling us what's wrong. We do have codes for it, so we're hoping this will be the fix for it.

BAD430BENZ

with that title.........i had to

_AMG_

Glad nothing serious happened.
I have heard of this same exact issue happening to other C63's running the Evosport (Powerchip) tune.

ZephyrAMG

I guess I just don't understand that if tuning a car is basically obtaining the extra "hidden" horsepower that the engine already has, WHY ALL THE PROBLEMS? Why doesn't are there not any issues with stock P31 ECU tuning from the factory?

So far we have had issues with Powerchip/EvoSport, OE Tuning, but no issues with Kleeman, Renntech or MHP from what I read...

brad @ evosport

That makes three of us!

No doubt!

Really? Who? I would fully expect that ANYONE with this issue after buying a tune would contact the supplier. Please direct them to us immediately so we can help them to resolve this. There are a number of steps that need to be taken to help isolate!

Again, a simple search will show you that there ARE problems with stock cars (P31 and non). FYI, I know of a bunch of cars without tunes that have this issue (search the internet for the code and you can see many people with stock cars with this issue). Our shop CLK63 BS is 100% stock and has the issue. This issue seems at the root to be a Mercedes issue. As I stated above, the dealer has our completely stock CLK63 BS and has spent 6+ weeks working on the car. I believe that the tuning amplifies or exaggerates a problem that is already there on some cars, making it much more obvious. While it is certainly possible that any tune alone will do this, with all the stock cars having the issue as well, it seems logical that it is a bigger issue. Unfortunately, MBZ USA and the dealers are of the mindset to blame mods rather than address the root issue.

Thanks
Brad

FixDaBenz

Pedal did not resolve the issue. Still giving same codes and going into limp mode. Hey brad can you PM me your contact info?

SonnyakaPig

Why don't you guys try to lemon the car? Is it out of warranty?

SonnyakaPig

What about purgve valve? Seems a lot of these cars need them to be replaced.

brad @ evosport

done

We are not the original owner, not sure we can. The dealer claims to have found the issue though, so we will know this week.

SonnyakaPig

I can't really provide legal advice on the internet. But, I think if someone wanted to pursue a claim along the lines of lemon law, not being the original owner wouldn't be fatal.

I'm glad the dealer may have found the fix. That's ultimately the best result.

_AMG_

Didnt Josh (C63guy) have this same problem?
Im not saying its only the Powerchip tune that causes this. Ive also heard the same issue regarding the Eurocharged tune as well.
Might even be an accelerator issue, who knows.

https://mbworld.org/forums/c63-amg-w...d-highway.html

https://mbworld.org/forums/4032894-post13.html

https://mbworld.org/forums/c63-amg-w...what-hell.html

brad @ evosport

He did and does still to some extent. His tune is not Powerchip any longer though.

Thanks
Brad

Powerchip

Do you have Powerchip software? We don't have any communication from Evosport about pedal problems on a 2011 C63 in the last two weeks.

Powerchip

Was this fixed?

What brand of software was fitted by Evosport?

audifreak

Have the same issue with my car after a custom tune.
The car goes into limp mode once hit about 4k rpm.
Went into diagnostic and it was due to more than 3% variance between the 2 openings of the throttle body.
As the C63 has 2 openings in the throttle body, it is control by 1 pedal. So its either the throttle body can't sync the opening properly or the pedal is sending unequal signals to the throttle body...at least this was what i was told.

Maverick1975

This happened to my ML63 with a Powerchip tune. Launder the car with pedal to the floor and went into limp mode. Powerchip software was removed and has never happened since with my Weistec, Brabus or Vath tunes.

justpetef

I was talking to a few of the AMG guys from the driving courses, who have been running the stock cars hard on tracks for 5+ years, and they have never, ever, seen this happen. It seems to be a direct result of the tunes from certain vendors, plain and simple.