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  #1  
Old 08-04-2017, 04:08 PM
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2011 BMW X5 35D SAV with Sport Package Blog

Hello folks,

I purchased a new to me X5 in June with the features below and pic.

I am starting this thread to learn the vehicle and ask the various questions from the forum.

I purchased the X5 with 106kmi. I added a tune from TTFS. I changed the oil, cabin filter and added an AFE Intake filter. I also got Carly and coded all of the various creature comfort options.

I have since put on it 6kmi mostly highway.

It hesitated initially and recently I have a rough idle and a dead spot from 1k to 2k RPM. The vehicle has no faults and I am trying to figure out where to begin my troubleshooting. The tune I have turned off EGR, SPF and DPF and emission related systems so if some faults are related to emissions they maybe masked.

Any guidance from the group?
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  #2  
Old 08-04-2017, 11:46 PM
ard ard is offline
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AFE intakes are (1) useless, (2) a waste of money, and (3) often times WORSE performance than stock.

What drove you to chose that mod??

Why not ask your tuner what is wrong?
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Old 08-05-2017, 04:35 PM
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I was referring to the intake filter only. My previous stock filter was dirty and found the AFE filter which I have used on previous cars with good results. There are good number of members here that use them and the engine breathed better with it. I do not know about an AFe intake for the X5 and I do not have one. Can you explain what you are referring to?

My tuner believes it is related to the EGR and recommends an EGR bypass. I have also received another recommendation from another reputable shop not in my area that this is related to either the injector or mass air flow filter.
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Old 08-06-2017, 11:38 AM
ard ard is offline
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Quote:
Originally Posted by loayo View Post
I was referring to the intake filter only. My previous stock filter was dirty and found the AFE filter which I have used on previous cars with good results. There are good number of members here that use them and the engine breathed better with it. I do not know about an AFe intake for the X5 and I do not have one. Can you explain what you are referring to?

My tuner believes it is related to the EGR and recommends an EGR bypass. I have also received another recommendation from another reputable shop not in my area that this is related to either the injector or mass air flow filter.
You have a forced induction motor- the air filter has virtually NO impact on 'engine breating'.

In fact when someone writes 'the engine breathes better' you know that don't have a clue.



Use the factory filter, replace every other oil change- you will have great performance AND you will protect your motor.

AFE filters are over-priced. In order to show 'better flow rates' they MUST 'filter worse'. Hence they let more particulates pass through the motor, and this increases oil contamination- more wear. It's the dirty secrete of the $2Billon dollar air filter scam market.


Was your car running perfectly when you did the tune? Or did it have issues, and you thought your would jsut tune it and go from there?

Without knowing how your car has been modified it is impossible to suggest what may be wrong. This is a common story with many different cars- people fail to appreciate that a car must be running perfectly BEFORE you start performance mods- if you don't, it becomes very difficult to determine if there is an issue with a mod or an issue with something else.
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Old 08-06-2017, 12:55 PM
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Your tuner doesn't make sense. At high throttle, the EGR is off even on stock tune.

If you stick with the same sized filter- for example our x5 panel filter: The paper filter generally flows and filters better because it has more surface area. This has been tested on other forums, comparing aftermarket filters. In some cases the aftermarket filters that flowed better passed through a lot more dirt.

On my x5 35d, I have a filter minder to measure intake vacuum before the maf. Even with my old filter it goes to at most 4 in H20. 27 in H20 is 1 psi, so 4 in h2o is about 0.15 psi.

In cases where the stock filter is small, like the 335d, running an aftermarket cone filter increases surface area and helps reduce restriction at higher rpm.
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Old 08-07-2017, 09:46 AM
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Thank you both for your input.

I definitely jumped the gun on the tune! I have had good experiences thus far and perhaps I got a little too excited.

That said - The car hesitated a little before the tune and immediately after the tune it was very good. Over time, the car started to hesitate especially 1k to 2k RPM. I was checking the car and checked the air intake which was dirty. I ordered the AFE intake and the car actually ran better from 1k to 2k RPM.

I am going to check it today as well as clean the MAF.

I am planning to revert to the stock tune as well. I am waiting to get time from the tuner to do this.

I was not really looking to to get huge gains from the intake, I just have used it albeit on my NA vehicles.

I will post once we look today. Planning to change the strut bushings. One of them is falling apart.
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Old 08-20-2017, 09:37 PM
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Update

I found out I have the following extended warranties

1. Footwell Module 8/125kmi / that was done
2. SCR Supply Module 10/120kmi
3. Active tank Reservoir 10/120kmi
4. NoX Sensors 10/120kmi
5. Front Drive Shaft 10/120kmi / that was done

The dealer changed the active sensor for a fault I had. This is what remains.

I am looking at replacing an injector then look at the DPF.

Engine / Motor:
- Fault: Injector cylinder 2 - Code: 00442C
- Fault: Injection quantity monitoring quantity error correction over range - Code: 004679
- Fault: Charge pressure control error - Code: 004530
- Fault: Particle filter system - Code: 00480A
- Fault: 2 injection plausibility is off 2 injection or the deviation from the target value - Code: 0046E7
- Fault: 1 after the injection, injection plausibility 1 is turned off or the deviation from the desired value - Code: 0046E6
- Fault: DDE control unit - Code: 004A8F
- Fault: Coolant thermostat Measured temperature too low compared to modeled temperature - Code: 004C89
- Fault: TCU low-pressure stage error - Code: 00429A
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Old 08-21-2017, 01:41 AM
ard ard is offline
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Are you 100% sure your charging system and battery are good? Want to make sure no low voltage issues are causing spurious errors.

Have you cleared the errors and they all come back?

These errors are all with the tuning in place?

Having been around FI and tuning, unless you start from a stable and error free motor, you can chase your tail for many $$$$$s.
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  #9  
Old 08-21-2017, 08:14 AM
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Quote:
Originally Posted by ard View Post
Are you 100% sure your charging system and battery are good? Want to make sure no low voltage issues are causing spurious errors.

Have you cleared the errors and they all come back?

These errors are all with the tuning in place?

Having been around FI and tuning, unless you start from a stable and error free motor, you can chase your tail for many $$$$$s.
Hello Ard,

Thanks for pointing this out. I removed the tune and reverted to stock. I cleared the errors and they come back. Interesting point about the battery and charging system. I have not checked that. Any recommendations? I can check the health of the battery but how can test the charging system?

I am holding off on tuning.

I am also getting the exhaust smell in the cabin now.

Also, there seems to be a clamp at the beginning of the EGR cooler. I am told this is not factory and perhaps a sign that a previous shop worked on it.

Thanks.

Regards,
Loay
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Old 08-21-2017, 08:35 AM
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Update my dealership is saying the following

"The odor that your are smelling in the cabin of the vehicle is caused by the carbon build up in the intake ports. This was the reason we were recommending taking off the intake manifold to clean out the intakes, we did noticed there was some excess build up when the vehicle was in."
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