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So for a while now I've had an issue with intermittent boost cut out in my GTS.. [zero boost]
I brought it into the dealership and they said it was due to the BOV's, so I removed them and turned it all back to stock.
Still intermittent boost cutout, no matter what engine speed or gear. After they looked things over they are now saying it's the tune which does not make any sense to me.
The boost cuts out at 40 mph - 100 mph load or no load... It all goes back to normal with just a simple roadside restart and no check engine warnings.
Seems like the stealer is taking the easy way out and blaming after market parts to avoid to have to deal with it. I would hook up one of those OBDII readers to see what the computer is saying related to the boost. I had an issue with a CPU gone bad not sending the right signals to turn the I/C on which was leading to the computer turning boost down but it was obviously intermittent. Seems like you have a different issue. Call your tuner, he should be able to help.
Tuner just said turn it back to stock and see if it happens again... This is becoming a pain in the *** at this point.
I ordered a new bone stock ECU to install and test to see if it has anything to do with the tune or is it something else...
That was the first thing I asked them and was told everything was ok... I'll get the new "stock" ecu in and see what happens next week, but first I need to get my 2018 e63s wagon back after the left front air spring is replaced.
Why limit yourself to one AMG with issues when you could have two....
Tuner just said turn it back to stock and see if it happens again... This is becoming a pain in the *** at this point.
I ordered a new bone stock ECU to install and test to see if it has anything to do with the tune or is it something else...
Instead of spending all that money on a new ECU why wouldn’t the tuner reflash/return your ECU back to stock? He must have saved the stock maps for you just in case...right?
In my assessment its the tuners issue to resolve not the dealer.
I'm not casting blame on the tune since tunes don't go bad...
Agreed. But, for example certain pieces of code aren’t working properly they should correct it and deliver you the customer a properly working product.
As you may know, most vendors back up and save your factory code for this very reason. It would only take 15 minutes or so to restore your MB factory code and test the results as part of their not your problem resolution process.
I'm not casting blame on the tune since tunes don't go bad...
Tunes shouldn't 'change' once installed, (I totally understand about adaptation, I'm talking about the basic code), it doesn't mean that they are perfectly written however.
If when you replace the ECU and are back to OEM parameters the car runs fine, you'll have the culprit identified.
And I agree with Jerry; your tuner should be assisting you with this since from a probability standpoint the aftermarket tune would be the highest on the list.
Seems like the stealer is taking the easy way out and blaming after market parts to avoid to have to deal with it. I would hook up one of those OBDII readers to see what the computer is saying related to the boost. I had an issue with a CPU gone bad not sending the right signals to turn the I/C on which was leading to the computer turning boost down but it was obviously intermittent. Seems like you have a different issue. Call your tuner, he should be able to help.
This is my worst nightmare re ecu tunes always worried something like this can happen . U have to have a huge amount of trust in the tuner. Now the dealer blames all your car problems on the tune and tuner says wait everything is good with tune and u are stuck in the middle. Wish u luck and hope someone steps up for u and fixes your car
I'll find out today, I'm on my way to the dealership to have a bone stock ECU installed today...we'll see how this works out.
I can't see it being the tune since I drove the **** out of the car in the mountains this weekend and the boost cut happened on the way home on the highway just rolling into the throttle at 70mph.
If it were the tune it would/should have cut the boost at full throttle/load in 3rd-4th gear not during slight acceleration in 6th...
I'll find out today, I'm on my way to the dealership to have a bone stock ECU installed today...we'll see how this works out.
I can't see it being the tune since I drove the **** out of the car in the mountains this weekend and the boost cut happened on the way home on the highway just rolling into the throttle at 70mph.
If it were the tune it would/should have cut the boost at full throttle/load in 3rd-4th gear not during slight acceleration in 6th...
What happened with your wagon and the suspension? What dealer you using now?
What happened with your wagon and the suspension? What dealer you using now?
Vic:
We can’t accurately diagnose the root cause of his problem since we can’t observe the condition occur.
As you well know turbo boost can be lost if there is a drop in fuel pressure which actually is a documented issue with the 2016 GTS. They had a group of them (mine being one of them) that had the high pressure fuel line collapse under hard acceleration and cause CEL’S and the car to lose power.
My suggestion is that he go to a dealer that will be willing go through all of the service bulletins that have been issued and ensure each and every one have been done on his car.
Some of the others are; Coil Pack Failure (A current bulletin is out on this issue again 3rd time I am told). Fuel evaporator failure. (The deal here is if you fill your car up they don’t want you to add more fuel after the fuel nozzle auto cutoff activates. It seems that extra fuel can go down the fume evaporator tube and clog the charcoal filter causing a failure).
We can’t accurately diagnose the root cause of his problem since we can’t observe the condition occur.
As you well know turbo boost can be lost if there is a drop in fuel pressure which actually is a documented issue with the 2016 GTS. They had a group of them (mine being one of them) that had the high pressure fuel line collapse under hard acceleration and cause CEL’S and the car to lose power.
My suggestion is that he go to a dealer that will be willing go through all of the service bulletins that have been issued and ensure each and every one have been done on his car.
Some of the others are; Coil Pack Failure (A current bulletin is out on this issue again 3rd time I am told). Fuel evaporator failure. (The deal here is if you fill your car up they don’t want you to add more fuel after the fuel nozzle auto cutoff activates. It seems that extra fuel can go down the fume evaporator tube and clog the charcoal filter causing a failure).
Regards
Jerry
Ummm I think you miss quoted me, I never tried to diagnose it but instead offered a cause which I experienced 3 years ago. My quote you used was in regards to his wagon which he is having issues on.
We can never technically be right on the forums unless we actually do all the work on the car and are experienced techs but we can offer up our experiences as thats pretty much what happens here.
The car is at the dealership getting a new new ECU and stock program GTS tune... I'll let you guys know if this issue comes back after I beat on it for a couple of days.
The dealer did say it was a over boost issue but he did tell me the ecu recorded a speed of 160mph at the same time ???? The boost cutout was at 70 mph ???
I have never taken the car over 120 mph, so that's odd..
Ummm I think you miss quoted me, I never tried to diagnose it but instead offered a cause which I experienced 3 years ago. My quote you used was in regards to his wagon which he is having issues on.
We can never technically be right on the forums unless we actually do all the work on the car and are experienced techs but we can offer up our experiences as thats pretty much what happens here.
Vic:
My apology for the misquote. Hopefully his GTS issues will be resolved very shortly.
The car is at the dealership getting a new new ECU and stock program GTS tune... I'll let you guys know if this issue comes back after I beat on it for a couple of days.
The dealer did say it was a over boost issue but he did tell me the ecu recorded a speed of 160mph at the same time ???? The boost cutout was at 70 mph ???
I have never taken the car over 120 mph, so that's odd..
I'm kind of wondering if the tune was 'corrupted' somehow during the install. In other words the major code was fine but at times when certain parameters were met the engine had the equivalent of an automotive TIA. This is why when I've dropped a car off for a hardware update in the last few years I'm always told it will be there all day in order to make sure the download was accurate.
I've got the car back with the bone stock GTS tune and all I can say is where the hell did all my throttle response and power go..
Sure the car handles great but I would never have bought this car with stock performance...
Now to put a quick 200 miles on it in the canyons and see if this slow AMG throws a code and drops it's boost... I hope I hope it does and it turns out to be something stupid..
I've got the car back with the bone stock GTS tune and all I can say is where the hell did all my throttle response and power go..
Sure the car handles great but I would never have bought this car with stock performance...
Now to put a quick 200 miles on it in the canyons and see if this slow AMG throws a code and drops it's boost... I hope I hope it does and it turns out to be something stupid..
.
No doubt a tune on the M177/178's sure make the car that much better IMHO as well.
I've got the car back with the bone stock GTS tune and all I can say is where the hell did all my throttle response and power go..
Sure the car handles great but I would never have bought this car with stock performance...
Now to put a quick 200 miles on it in the canyons and see if this slow AMG throws a code and drops it's boost... I hope I hope it does and it turns out to be something stupid..
.
It will no doubt adapt to your driving style soon enough and become more ‘aggressive’ in its responses.
No matter how one drives a GTS or any benz for that matter, a tune will change the throttle response exponentially vs adaptation changes. Benz adaptions require multiple cycles of throttle inputs (over 40) and it requires one to be on and off the throttle to get the best results; dont just keep it in range of pressure. Its almost better to drive the car on the street in a stop and go environment where you can get some WOT quick pulses then slow and getting a lot of presses.
A new ECU would have reset your adaptions to arguably a stronger response than post adaptations from a lazy driver so that tune must go back
06-08-2018, 05:20 PM
