[BMWdriva]

Thank you for the explanation. And what do you think, why I have misfires on bank 1? I had more misfire counts on bank 2 than on bank 1 when car had 20000 miles. But did not have any problem till 40000miles. What does this mean?

So it's time to change the candles.

[bmwlover]

Thank you for the explanation. And what do you think, why I have misfires on bank 1? I had more misfire counts on bank 2 than on bank 1 when car had 20000 miles. But did not have any problem till 40000miles. What does this mean?

So it's time to change the candles.

Factory candles- spark plugs last more than 50000 miles 1500 hours on bmw. I had misfires on 20000 miles too. (On 20000 miles cannot say that spark plugs were bad.) Besode this, I am going to buy new spark plugs now. Which one will be good decision? Bosch or ngk? Which model?

[B1257]

How to check it wity my diag tool?  I was not able to find that test for injectors or for misfires. Cannot find in google too. Faults are: 29e1; 2b1b; 2b1d mixture control bank 2 and msifires on cylinder 6-8
I think that injector cannot cause 29e1 -miture control bank 2 error. But 29e1 can cause misfires. Because of that I checked  air mass sensors but they work.

If you put the codes into ISTA the 29E1 is also charge air temperature sensor short circuit to ground,
the other two faults are misfire detection cyl 6 2b1b and cyl 8 2b1d.

There could me another problem with carbon deposits in the intake ports or valves. Even bad compression could start a misfire detection, because of bad combustion inside the chamber. Therefore I would check the sparks.

To find diag procedure in ISTA put your VIN in, or search the car type with the basic features.
After this open the start search button on the right lower side, look at the field search string and write for example misfire detection. Later you will find several ABL plans for testing the modules or parts you are looking for.

The FUB plans will explain the technical backround what the ABL test plan is doing and why.


Example carbon deposits in the intake ports

Automatic test for detection of carbon deposits in the intake ports in the test module for misfire
Depending on the driving profile and/or fuel quality, deposits may form in the intake ports and on the intake valves. These deposits can over time lead to driving complaints and fault code entries in the Digital Engine Electronics (DME).
The following symptoms may occur during vehicle operation:

• Rough idle
  
• Brief jerking/surge and or combustion miss in the engine-speed range between 2000 and 4000 rpm during full-throttle acceleration
  

The test for carbon deposits helps determine whether deposits that can affect engine performance are present in the intake ports.
Test procedure
A "sooted" engine will have greater valve overlap combined with problems with residual gases, and as a result it will run more roughly than a "clean" engine. This can be measured using rough running values that indicate combustion consistency within the engine.

• Switch off all electrical equipment and always connect a battery charger in order to minimize the load on the engine.
  
• Engine temperature should be below 45 °C, as the effects of carbon deposits are more difficult to detect when the engine is warm. Steps should also be taken to prevent the electric fan from starting during the test
  
• The timing of the exhaust valve is locked in, while the intake valve's timing is continuously adjusted from advanced to retarded in order to cover a range extending from maximum to minimum valve overlap.
  
• The rough running values indicating combustion consistency are simultaneously recorded for subsequent evaluation.
  
• The result that is then issued indicates whether it will be necessary to clean the intake ports.
  

From my point of view is ISTA the best tool to find engine trouble makers.

[bmwlover]

Great people here. I appreciate your help. Will try to check misfire, compression too and write results here.

[Node]

If you put the codes into ISTA the 29E1 is also charge air temperature sensor short circuit to ground

You are wrong here. 29E1 may mean mixture control 2 or charge air temperature sensors, but NEVER ON THE SAME ENGINE model. ISTA identifies exact model and screenshot of OP indicates its mixture control 2 for the engine in question.

---

Thank you for the explanation. And what do you think, why I have misfires on bank 1? I had more misfire counts on bank 2 than on bank 1 when car had 20000 miles. But did not have any problem till 40000miles. What does this mean?

I guess injector did not start leaking heavily overnight. Most probably it was deteriorating over longer time and finally reached the state when DME can no longer compensate for that.

[B1257]

If you put the codes into ISTA the 29E1 is also charge air temperature sensor short circuit to ground

You are wrong here. 29E1 may mean mixture control 2 or charge air temperature sensors, but NEVER ON THE SAME ENGINE model. ISTA identifies exact model and screenshot of OP indicates its mixture control 2 for the engine in question.

---

Shure if you say may be, it was only the information ISTA could say about the fault 29E1 and as you said never on the same engine. I dont have the rest of the information about this engine. (N63, N63TU or N63TU2). All three types have different ECUs. (MSD85, MEVD17.2.8, DME8.8)

I know that this engine had problems with injectors, but it would be a good idea to run the test for carbon deposits too. Carbon deposits are a troublemaker on direct injection engines. It depends on the driving profile, but it could be a problem. Therefore I would check or renew the sparks too and may be to exclude mechanical trouble make a pressure lost test.

[2013m5]

The problem is injector leaks that caused the fuel pressure dropped. He should get his hands dirty, using keyboard won’t fix the problem.
His complaint is “n63 pressure in the rail of cylinder bank 2 drops too quickly”.