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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications 550i CHeck Engine Light - BMS Stage 2, Downpipes, Exhaust
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      03-31-2016, 10:28 AM   #1
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550i CHeck Engine Light - BMS Stage 2, Downpipes, Exhaust

I have a 2011 550i manual shift equipped with a BMS Stage 2, Evolution Racewerks catless downpipes, and Schteigen exhaust. Currently has 56k miles. After installing downpipes/exhaust, I get check engine light regularly. Under hard acceleration (especially in 4th gear) the car will lag and jerk and eventually fall into drivetrain malfunction. I took it in to local European car specialists and they encourage me to replace spark plugs. After replacing plugs, the same failure happens. Now they are recommending a carbon cleaning which requires engine removal. Does anyone have any experience with this? Please help
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      03-31-2016, 10:36 AM   #2
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Have you had the CCP done ?

also another thing Terry @ BMS has said this before

" We've noticed a lot of n63s throw a MAF sensor code at higher rpm/power levels. In some cases replacing the sensor with a new one has resolved the issue. The best price we've found is at rockauto.com BOSCH Part 0280218270, Mass Air Flow Sensor, $ 119.99. "

http://www.n54tech.com/forums/showthread.php?t=22748


Best bet is to read the code your getting with that drivetrain malf, that way I can help you out better.
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      03-31-2016, 11:23 AM   #3
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Don't bother with the MAF sensor yet. Get your cars code read properly and find out what code it's throwing. I'm guessing it's a misfire and due to one of your ignition coils. Especially since they were only changed under CCP if they were found to be faulty.

If you have BMS Stage 2 it's highly recommended to have a BT cable as well. You're going to throw drivetrain malfunctions from time to time, I've been running it for 30k miles and throw random CEL's at random times
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      03-31-2016, 12:54 PM   #4
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it's catless do you have faulers on the down pipes ? we need your codes.
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      03-31-2016, 01:20 PM   #5
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At a minimum, get the bmw carly app and adapter and read the codes.
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      03-31-2016, 03:05 PM   #6
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I agree with the above, it sounds like a misfire, you need to pull the actual codes.

The MAF cutout should be a temporary drivetrain malfunction that doesn't put the car in limp mode. However, if the car detects a misfire it will cut injection to that cylinder so the engine will run rough until you restart it.
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      03-31-2016, 03:08 PM   #7
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If this european specialist didnt at least pull the codes before they started recommending services, you should find a diffrent shop.
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      03-31-2016, 04:04 PM   #8
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I had the same issue after installing the same mods. I had a misfire on bank 3 it was a bad coil pack.
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      03-31-2016, 04:15 PM   #9
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I had the same issues. I have done the following:

Replaced spark plugs.
Replaced two coil packs on bank 1.
Replaced ignition harness.
Dealer replaced my bank 1 HPFP.
Cleaned both MAFs and both TMAP sensors.

The cause for me was the passenger side high pressure fuel pump. Dealer replaced it.

I run stage 2 aggressive at 3.5 on 93. I've still experienced stumbles at idle, and I dyno'd well below stage 2 numbers the day before yesterday. It was 446whp/486wtrq, STD on a DynoJet just like Burger, so the numbers stunk.

I replaced the driver's side HPFP an hour ago. Easy swap out, and I negotiated BMW parts guy down to $160. One thing to note, I think you need to disconnect the battery because the LPFP periodically primes the line, so gas sprayed out every so often even though the lines were disconnected and depressurized.

Anyone with basic hand tools can do it. So if one of your HPFPs broke, you can replace it in under an hour. I'll bet you lunch your issues are NOT related to carbon buildup. They're trying to nickel and dime you to death. If you need any help let me know.

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      03-31-2016, 04:38 PM   #10
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You have to pull the engine to do carbon cleaning ?? I had this problem in my n54. It's most likely a coil. You should do a cleaning it wouldn't hurt with your mileage.
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      03-31-2016, 08:42 PM   #11
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You did yourself a favor by posting the problem on here. I have never heard of carbon buildup occurring on an N63. It was a problem on the N54s, but that does not mean anything for our cars. BMW knew of the carbon buildup solution at the time of the design of the N63 and N55, hence why you never hear of it.

Take the advice from the guys on here that have experienced the same problem with the same equipment, including the advice of being weary of the shop you've been going to. Like many have said, if the shop isn't pulling the faults stored in the car's computers, then they don't know what they're doing.
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      04-01-2016, 01:26 PM   #12
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+1 on pulling the codes before replacing any part ... Not sure why the mechanic did not do that when you took the car to him?
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      04-01-2016, 01:50 PM   #13
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Quote:
Originally Posted by UA_civ_eng View Post
You did yourself a favor by posting the problem on here. I have never heard of carbon buildup occurring on an N63. It was a problem on the N54s, but that does not mean anything for our cars. BMW knew of the carbon buildup solution at the time of the design of the N63 and N55, hence why you never hear of it.

Take the advice from the guys on here that have experienced the same problem with the same equipment, including the advice of being weary of the shop you've been going to. Like many have said, if the shop isn't pulling the faults stored in the car's computers, then they don't know what they're doing.

I would expect the carbon buildup still to be an issue on our newer engines. This is a problem with direct injection in general, not just BMW. If you pull off our intake components you will see some oil from the CCV system, and that oil is definitely making it to the valves. If it was easier I would definitely have it done on my 60k+ N63 and would expect to see buildup for sure.
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      04-01-2016, 08:16 PM   #14
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Guarantee it's one of your ignition coils
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      04-02-2016, 03:00 PM   #15
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Any BMW owner that buys a JB4 and has over 20k miles on their car should be required by Burger law to replace all spark plugs and coils at time of JB4 installation...especially the coils.
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      04-02-2016, 04:32 PM   #16
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Quote:
Originally Posted by EZgo View Post
Any BMW owner that buys a JB4 and has over 20k miles on their car should be required by Burger law to replace all spark plugs and coils at time of JB4 installation...especially the coils.
+100
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      04-02-2016, 05:16 PM   #17
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Quote:
Originally Posted by EZgo View Post
Any BMW owner that buys a JB4 and has over 20k miles on their car should be required by Burger law to replace all spark plugs and coils at time of JB4 installation...especially the coils.
Any owner that tunes his car needs to replace spark plugs at the very least

Old spark plugs + more power = Cylinder misfire
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      04-03-2016, 09:03 PM   #18
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Thank all of you for the replies. They did pull the actual codes and they are: (115D08, 10C101, 10C001, 180101, 180008). Are any of you running an O2 simulator to clear the CEL from the catless downpipes?
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      04-03-2016, 11:32 PM   #19
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Quote:
Originally Posted by GWP View Post
Thank all of you for the replies. They did pull the actual codes and they are: (115D08, 10C101, 10C001, 180101, 180008). Are any of you running an O2 simulator to clear the CEL from the catless downpipes?
Here they are from ISTA/D

115D08: Injection Quantity Compensation, plausability: Small-quantity nominal value

"Diagnosis monitors whether a small quantity value was coded and whether it is within a plausible range. Falsely coded values that are within the thresholds are not recognised

The fault is detected when the small quantity value of at least one fuel injector is above 2.86 mg/stroke or below 1.55 mg/stroke.

Possible fault cause:

‐ At least one fuel injector not coded

- Fuel injector coding incorrect"

According to ISTA/D, this code should not trigger a CEL or CC message or reduced engine output.

10C101: Charge air signal change too fast (from BMS, this is OK to see)
10C001: Charge air signal change too fast (from BMS, this is OK to see)

180101: Cat efficiency below limit (from catless DP)
180008: Cat efficiency below limit (from catless DP)

So the weird thing is none of these codes should be from your drivetrain malfunctions, not what I would expect to see.
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      04-04-2016, 01:27 AM   #20
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115D08: Injection Quantity Compensation, plausability: Small-quantity nominal value

have the same code always in my car after CCP
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      04-04-2016, 05:28 PM   #21
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thank you for the input. These codes "popped" up from 03/28 through 03/31 last week. All codes had been cleared on 03/28, so I don't know what was present prior to 03/28. All I know is that sometimes while under acceleration, the car will "jerk" and the drivetrain malfunction warning will pop up. After cycling the car off/on, it goes away.

Going back to the CEL's from the catless downpipes.... Are any of you using an O@ simulator? If not, how are you ridding the CEL?
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      04-04-2016, 05:41 PM   #22
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Quote:
Originally Posted by GWP View Post
thank you for the input. These codes "popped" up from 03/28 through 03/31 last week. All codes had been cleared on 03/28, so I don't know what was present prior to 03/28. All I know is that sometimes while under acceleration, the car will "jerk" and the drivetrain malfunction warning will pop up. After cycling the car off/on, it goes away.

Going back to the CEL's from the catless downpipes.... Are any of you using an O@ simulator? If not, how are you ridding the CEL?
I've done a lot of searching and searching to answer your last question for myself and come up empty for our cars. There's no post out there where anyone comes out explicitly saying they have a solution, and there's no one that advertises a simulator or emulator for our cars. There have been some threads I've found of people trying to pull the O2 sensor out of the stream more (an o2 dedicated logner pipe or spacers) but they all eventually seem to fail for reasons unspecified.

Without a flash tune we are pretty much stuck on the non-TU N63 with CELs. If anyone has seem something that disagrees with this please correct me.
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