[dumalei]

I scan my car with BMWhat app and got an error code.
004592 Smoothness regulator 4 cylinder correction variable outside the
80k miles on the car now. currently running JR stage 2 tune with EGR DPF and SCR delete.(since Jan 1,2015) I think the car is running fine. Any idea?

[9mmkungfu]

Have you ever had the carbon cleaning performed?

[dumalei]

Originally Posted by 9mmkungfu

Have you ever had the carbon cleaning performed?

I don't think so.

[dumalei]

The check engine light is not on too.

[9mmkungfu]

If you are able to, I would pop the intake off and take a look.

[dumalei]

should i get a shop to perform carbon cleaning ?
Will getting Meth help cleaning that out ?

[NC335d]

Originally Posted by dumalei

should i get a shop to perform carbon cleaning ?
Will getting Meth help cleaning that out ?

I would def. get a shop to do the cleaning for you. It is quite a laborious job.

As far as meth goes, once you get the CBU removed, the meth will help keep everything cleaner.

[dumalei]

Originally Posted by NC335d

I would def. get a shop to do the cleaning for you. It is quite a laborious job.

As far as meth goes, once you get the CBU removed, the meth will help keep everything cleaner.

I think so too. How much am I looking for the CBU cleaning? Is it possible that can meth clean up the CBU that is there already?

[BB_cuda]

Before you jump to conclusions, how many miles were in car when EGR was blocked. If you just did all of the alphabet delete at beginning of this year and EGR was open before that then I agree with looking in intake. Hooper had a mess in his intake at 65k miles. He didn't clean and methed it instead. He later pulled the intake and she was clean clean. He didn't have codes though.

[dumalei]

Originally Posted by BB_cuda

Before you jump to conclusions, how many miles were in car when EGR was blocked. If you just did all of the alphabet delete at beginning of this year and EGR was open before that then I agree with looking in intake. Hooper had a mess in his intake at 65k miles. He didn't clean and methed it instead. He later pulled the intake and she was clean clean. He didn't have codes though.

Wow. I'm amazed how much does meth do to our cars. I think I have about 4000 miles with the EGR blocked. How many miles did hooper drive with meth before he took the intake out?

[Hoooper]

I can't remember, I think I said it in that thread though. Maybe something like 10-15k miles?

[dumalei]

Originally Posted by Hoooper

I can't remember, I think I said it in that thread though. Maybe something like 10-15k miles?

I am thinking to do that too. Since now is not serious enough to get the check engine light on. What do you think?

[dumalei]

If I run meth with the tune I have now, will I get any engine check light or code ?

[NC335d]

Originally Posted by dumalei

If I run meth with the tune I have now, will I get any engine check light or code ?

It probably depends on the severity of the CBU. It could start throwing codes for injectors etc. before the meth has time to do its job as it will be a gradual process. Considering the money you spent on the car, I personally would go ahead and spend the $1500 and get the CBU cleaning done to be on the safe side and have piece of mind. If you start getting into injector fault codes etc. the dealership ail charge you around $1200 to recalibrate the injectors after the CBU cleaning. It is my opinion to pay now instead of pay more later.

[shnaggs]

So is this ^^^^ actually necessary after a carbon cleaning??? I was under the impression that a few people here have done the carbon cleaning themselves and had no issues after the fact. They did not mention anything about getting the injectors calibrated at the dealer, that I'm aware of.

[kbsilver]

Originally Posted by shnaggs

So is this ^^^^ actually necessary after a carbon cleaning??? I was under the impression that a few people here have done the carbon cleaning themselves and had no issues after the fact. They did not mention anything about getting the injectors calibrated at the dealer, that I'm aware of.

Injector calibration is an important part of the CBU clean-up process. I suspect while in many cases it's not absolutely necessary in the short term, but will prevent SES's for injector issues down the road. As mine was done under warranty, I was not aware this was a separate charge. I do not know if this is directly related to the CBU or just an aging thing with the injectors. For me and what I read for most, is they establish an IRAP (remote access) session with BMW engineering as the local dealer is not equipped to do this themselves. What I believe happens is they capture a whole bunch of operating parameters, run it through some complex algorithms, and determine the final injector calibration values.

[9mmkungfu]

When I had my carbon cleaning done by the dealer, the charge was $1200 and it included the IRAP session for resetting the zero mass adaptation values.

I believe the newest version of ISTA/D or ISTA/P allows for the reset to be done without the IRAP session.

[dumalei]

Thanks for the comment everyone!! sounds like carbon cleaning will be a better option for me then. But the problem is. Will the dealer accept a tuned car? If they accept it, will I lose my tune after they reset everything ?

[NC335d]

Originally Posted by dumalei

Thanks for the comment everyone!! sounds like carbon cleaning will be a better option for me then. But the problem is. Will the dealer accept a tuned car? If they accept it, will I lose my tune after they reset everything ?

What kind of tune do you have? A lot of the time the dealers won't be able to tell that you have a tune unless they go looking for it. If they reset everything, you might need to send your DME off and get it re-flashed. Am I correct in understanding that you have the EGR block off plates in place? If so, you might want to remove them before you take your car in to the dealer.

[dumalei]

Originally Posted by NC335d

What kind of tune do you have? A lot of the time the dealers won't be able to tell that you have a tune unless they go looking for it. If they reset everything, you might need to send your DME off and get it re-flashed. Am I correct in understanding that you have the EGR block off plates in place? If so, you might want to remove them before you take your car in to the dealer.

Yes I have the block off plates in place and my tune is done my JR auto from Canada. It's stage 2 with emissions deleted. Just to make sure, is it a must to reset the injectors after CBU cleaning ?

[Hoooper]

Originally Posted by NC335d

Am I correct in understanding that you have the EGR block off plates in place? If so, you might want to remove them before you take your car in to the dealer.

I completely agree, but I do think it would be entertaining to see the dealer try to explain how a blocked EGR caused CBU

[dumalei]

Originally Posted by Hoooper

I completely agree, but I do think it would be entertaining to see the dealer try to explain how a blocked EGR caused CBU

so is this code more likely to be a injector problem? or the intake is stuck with too much carbon?