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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > N52 idle/performance issues with carly scan results



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      03-27-2016, 03:45 PM   #1
X330I
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N52 idle/performance issues with carly scan results

Sooo.....this is what came up 06 330xi 6mt
Any help is appreciated , thanks in advance!

This is what i have
Ccv and all hoses
Maf sensor
Spark plugs
Air filter
Passenger seat mat bypass (installed)

This is what's wrong
Burning/leaking oil from rear of engine (told ccv breather hose)
Loss of power (low rpm only, above 4k it moves)
Rough idle and whistling noise (while idling)
Noisy idle

This is what i plan on ordering tomorrow:
Disa valve (not sure which is which but code read actuator 2 any help on that?
Safety battery terminal wire

This is what was done
Replace valve cover gasket and the recommended gaskets with it (in hope of oil leak fix)

Codes from carly app
air mass system code: 002d06
Air mass meter code:002d0f
Variable intake manifold actuator 2 code: 002aac
Mixture to lean code: 002a2f & 002a2e
Safety battery terminal code: 0093b2
Wheel tolerance control failure F-CAN code: 00c998
Attached Images
File Type: pdf FaultReport_CarlyForBMW.pdf (4.3 KB, 81 views)

Last edited by X330I; 03-27-2016 at 03:58 PM.
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      03-29-2016, 01:28 PM   #2
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anyone ?
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      03-29-2016, 02:28 PM   #3
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I wish I could help you, I've been trying to sort out my 2A2E/2A2F codes for 6 months. So far I've done:

Fresh oil (2x)
New MAF
New air filter (2x)
Replaced PCV system and all hoses
Replaced both VANOS solenoids
Replaced both DISA motors
New spark plugs
New ignition coils

Next best guess is O2 sensors but I've already thrown about $2k in parts at this and the car drives fine.
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      03-29-2016, 02:35 PM   #4
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check the big disa valve most of the time axis failure,30min job to remove and check otherwise for the small one you should remove the manifold,also you have wheel speed sensor faulty as the door lock actuator. Disa should be your priority
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      03-29-2016, 09:00 PM   #5
X330I
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thanks so much for your help...i just ordered the disa from ecs. how can i find out which speed sensor ? also in regards to the safety battery terminal i seen a bypass on ebay is that something i should look into ?
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      03-30-2016, 08:11 AM   #6
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Any sort of MAF code with a whistle is a vacuum leak. can you tell where it's whistling from?
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      04-01-2016, 01:31 PM   #7
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I pulled my disa valve and it's stuck open so my new one should be here Monday. The whistle noise is definitely coming from the intake side just can't find it, it dosent do it all the time...
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      04-01-2016, 09:42 PM   #8
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New DISA will be in the closed position when shipped for protection, but once used the default position when the engine is turned off is open.
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      04-01-2016, 10:00 PM   #9
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Quote:
Originally Posted by frenchi View Post
check the big disa valve most of the time axis failure,30min job to remove and check otherwise for the small one you should remove the manifold,also you have wheel speed sensor faulty as the door lock actuator. Disa should be your priority
What are symptoms of a faulty or leaking DISA?
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      04-02-2016, 07:33 AM   #10
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Quote:
Originally Posted by BMW.. View Post
What are symptoms of a faulty or leaking DISA?
lost of power from low to midrange rpm and rough idle...most of the time but not always will trigger an error. Failed one will make a big mess up with your engine
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      04-04-2016, 07:24 PM   #11
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i pulled the disa and its stuck open i dont know if that means it failed or not
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      04-04-2016, 08:00 PM   #12
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If you have access to INPA and a cable of course, you can actuate each DISA unit to test this. When I replaced both DISA units on my 330i after being incorrectly advised the larger unit was also in the open position with the smaller being in the closed position. I was able to actuate them both when testing with INPA and you can actually hear them "clack" open and closed. So I don't think it being in the open position is a problem.

Also check here - DIY to remove and clean Z4 N52 large DISA...
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      04-06-2016, 11:17 AM   #13
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The DISA valves aren't stuck, they are suppose to be stiff. They should not be moved by hand, only via activating the motor.

The typical failure for DISA valves on this motor are that the flap breaks away from the actuating rod, allowing the flap to pivot freely.
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      04-06-2016, 03:44 PM   #14
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thanks for everyone help, i have the cable and carly app how do i get the INPA? if thats not the problem then i need to find this vacuum leak somewhere. its funny that i got a code for the actuator 2 tho...
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      04-10-2016, 09:13 PM   #15
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You have a leaking breather hose? I'd replace that first. Eliminate known problems for starters. Please let me know what the results are as I'm fighting a bit of this myself! I just pulled my top DISA and it was stiff, so I assumed in good working order.
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      04-11-2016, 09:21 AM   #16
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Yea thats another thing, my ccv has a little opening on top where there is a little hose that suppose to run to the intake arm by the throttle body but there is no connection for a hose by the throttle body just a closed arm sticking out.

I'm not sure if thats where the vaccum leak is coming from but i replaced my breather hose that runs to the back of the valve cover and that cleared up the oil burning/smoking for about 2 days. The only thing i know abut the oil leak is it's coming from the rear of the engine.
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      04-13-2016, 12:33 PM   #17
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Yeah fix the obvious broken items before buying more parts. Sounds like a vacuum like, which means your best course is to take apart and physically look around. Smoke test, too.
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